Search found 1857 matches

by charlie g
Tue Feb 06, 2024 2:34 am
Forum: Microscopes and optics
Topic: Stereoscope vs. Compound Microscope at Given Total Magnification
Replies: 6
Views: 885

Re: Stereoscope vs. Compound Microscope at Given Total Magnification

Thanks, j-wisc, for this thoughtful/ useful thread, hi all. My stereoscope would only awaken from it's storage shelf...if/when I am introducing novice microscopy ( informal, or formal students) folk to the dimensions of our world , of our everyday world ...our important microbe and meiofauna service...
by charlie g
Sat Feb 03, 2024 7:54 am
Forum: Miscellaneous
Topic: Private Messages are not being send
Replies: 4
Views: 1447

Re: Private Messages are not being send

For quite a few weeks, my 'sent PM's' show no indication they were "sent"..they just sit in my "outbox"..it does seem like an irregularity. charlie g
by charlie g
Sat Feb 03, 2024 7:46 am
Forum: Beginner's corner
Topic: Importing Items From Europe to US
Replies: 12
Views: 1716

Re: Importing Items From Europe to US

Hi, J-wisc, and all..quite a few threads ago ( maybe two months?) I groused about trying to purchase gift tee-shirts ( really, really cool '3D images on the shirts)...I was sort of not understood in my lament: the singapore firm..as your progressed through 'check out'..kept applying fees...the most ...
by charlie g
Sat Feb 03, 2024 6:40 am
Forum: Beginner's corner
Topic: Several choices of microscopes; what's your opinion?
Replies: 17
Views: 2258

Re: Several choices of microscopes; what's your opinion?

@charlie g - I sent you a private message, re: this thread. If for some reason it didn’t go through, let me know. It’s just so long, I didn’t want to post it on here. Thanks! Cheers, jackieone, I replied to your PM..please post in forum your microscopy objectives to have forum folk advise you. Foru...
by charlie g
Sat Feb 03, 2024 4:39 am
Forum: Beginner's corner
Topic: Several choices of microscopes; what's your opinion?
Replies: 17
Views: 2258

Re: Several choices of microscopes; what's your opinion?

Will get back to you with PM, jackieone. Your con-US, so if I can send you a scope pkg., it's sensible shipping cost. charlie g/ finger lakes NY
by charlie g
Fri Feb 02, 2024 8:44 pm
Forum: Beginner's corner
Topic: Several choices of microscopes; what's your opinion?
Replies: 17
Views: 2258

Re: Several choices of microscopes; what's your opinion?

Hi, jackieone...as apochronaut knows from when I mailed him a vintage: "Ortho-Illuminator'"..the silent gorilla in the room is: shipping costs. Are you located con-US, jackieone? all the best, charlie guevara who when at St.Lawrence river cottage..well I can just about shoot a fireworks rocket up ov...
by charlie g
Tue Jan 30, 2024 7:21 pm
Forum: For forum members who want to buy and sell equipment
Topic: Leitz Plan 1.6X objective
Replies: 9
Views: 1498

Re: Leitz Plan 1.6X objective

Hi, einman and all...quite a few years ago I paid $200 for a Nikon plan 1X/ 160 tl, I paid $200 for a Nikon plan 2X/160 tl. The 2x I use often, the 1X sleeps in it's plastic vial in a cigar box.

charlie g
by charlie g
Tue Jan 30, 2024 4:30 am
Forum: For forum members who want to buy and sell equipment
Topic: eBay Catch-22 Login Problem
Replies: 4
Views: 1065

Re: eBay Catch-22 Login Problem

With a lot of: 'jumping through hoops'..I was able to get telephone contact with the ' eBay suits'..here in con-US. I wonder if OP could have used eBay phone contact to assist with getting account running again..it really is a tedious process to get eBay contact by telephone..but it works in con-US....
by charlie g
Tue Jan 30, 2024 4:19 am
Forum: Pictures and Videos
Topic: Under the 1/24 ice , mesocosm collection.
Replies: 31
Views: 3006

Re: Under the 1/24 ice , mesocosm collection.

On my second scoop water sample from the stream mesocosm ( after 1/27-1/28/24 abrupt ice thaw in our region), I noted a rotifer rapidly circling a small gas bubble...this rapid circling of the gas buuble..with the rotifers corona always touching the gas bubble...went on for ten minutes. I fed huge g...
by charlie g
Tue Jan 30, 2024 3:42 am
Forum: Pictures and Videos
Topic: Under the 1/24 ice , mesocosm collection.
Replies: 31
Views: 3006

Re: Under the 1/24 ice , mesocosm collection.

Many of these gold/orange colored dinoflagellates encountered with each wet mount slide I freshly pipet up from the now partially thawed ( much open waters) stream section of my mesocosm. The wetmount slide also contained two water bears plodding along shafts of algae. Most wonderful for me, a first...
by charlie g
Tue Jan 30, 2024 2:05 am
Forum: Beginner's corner
Topic: Several choices of microscopes; what's your opinion?
Replies: 17
Views: 2258

Re: Several choices of microscopes; what's your opinion?

Hi, jackieone, are you located con-US? I have excellent 160mm/finite SteindorfBerlin with trinocular head, with illumination setup. very low cost+ shipping. Other scope setups too , Olympus/Tokyo CKa inverted microscope with illumination setup...$120+shipping, other scopes too. I also can supply mic...
by charlie g
Sun Jan 28, 2024 10:06 pm
Forum: Home-made microscope adaptations
Topic: Inverted microscope viewing
Replies: 7
Views: 1381

Re: Inverted microscope viewing

Hi, frankiev, if your observation portal is the cover glass 'floor'..no need to utilize hard to work with glass slides. Choose an easier material to cut apertures in, for your coverslip observation 'floor'. Consider using the larger rectangular cover slips ( do not limit your slides to: 12mmx12mm co...
by charlie g
Sun Jan 28, 2024 1:56 am
Forum: Pictures and Videos
Topic: Under the 1/24 ice , mesocosm collection.
Replies: 31
Views: 3006

Re: Under the 1/24 ice , mesocosm collection.

Yup, dennis, this breed is a 'winter dog'...in 'dog days of summer'..this breed is an: 'air-conditioner dog'.

We hail from Bergen county/Ridgewood, NJ...I hope your NJ winter has been going okay.
by charlie g
Sun Jan 28, 2024 1:36 am
Forum: Miscellaneous
Topic: A discussion about experience
Replies: 39
Views: 35182

Re: A discussion about experience

Right you are, polymerase, the dignity and adherence to 'scientific method of seeking reality outside ourselves'...is the way to go deeper into experiencing objective reality. My 'caution' is my sense that we are quite approaching a paradigm shift...and troubles arise when we educated westerners can...
by charlie g
Sat Jan 27, 2024 5:47 am
Forum: Pictures and Videos
Topic: Under the 1/24 ice , mesocosm collection.
Replies: 31
Views: 3006

Re: Under the 1/24 ice , mesocosm collection.

Hi, squint a lot, thanks for looking. Any microscopist can collect area ( native assemblages) from their locals open spaces...and enjoy a vibrant microcosm..no need for a mesocosm as I fabricated. I enjoy native fish , and i foolishly attempt to in my stream segment...establish freshwater mussels na...
by charlie g
Sat Jan 27, 2024 5:31 am
Forum: Pictures and Videos
Topic: Under the 1/24 ice , mesocosm collection.
Replies: 31
Views: 3006

Re: Under the 1/24 ice , mesocosm collection.

Ahh, this crazy weather/ changing 'new normal' weather...by 1/26/24..all snow on ground melted..ice in the stream-pond meso cosum mostly melted. This worries me.

The area streams were all swollen with melt water..my good doggie sensibly did not enter the rapid angry stream flow.
by charlie g
Sat Jan 27, 2024 5:13 am
Forum: Pictures and Videos
Topic: Under the 1/24 ice , mesocosm collection.
Replies: 31
Views: 3006

Re: Under the 1/24 ice , mesocosm collection.

Water bear graced my first wet mount slide, quite a microscopy observational treat.
by charlie g
Sat Jan 27, 2024 4:46 am
Forum: Pictures and Videos
Topic: Under the 1/24 ice , mesocosm collection.
Replies: 31
Views: 3006

Re: Under the 1/24 ice , mesocosm collection.

With such a narrow ( 'skinny') body form..I wonder how these peritrichs have room for daily heterozoic engulfment of foods..withthe dense cluster of algae within the protists body volume.
by charlie g
Sat Jan 27, 2024 4:38 am
Forum: Pictures and Videos
Topic: Under the 1/24 ice , mesocosm collection.
Replies: 31
Views: 3006

Re: Under the 1/24 ice , mesocosm collection.

Peritrich protozoa enjoy their algae thick matts. Some actually have endosymbiotic algae.
by charlie g
Sat Jan 27, 2024 4:28 am
Forum: Pictures and Videos
Topic: Under the 1/24 ice , mesocosm collection.
Replies: 31
Views: 3006

Re: Under the 1/24 ice , mesocosm collection.

Paramecium bursaria was quite irritated that I slurped it up and onto a wetmount slide.
by charlie g
Sat Jan 27, 2024 4:20 am
Forum: Pictures and Videos
Topic: Under the 1/24 ice , mesocosm collection.
Replies: 31
Views: 3006

Re: Under the 1/24 ice , mesocosm collection.

Collotheca sp. of rotifer, in secreted gelatinous tube , a free living 'sessile rotifer' in our freshwaters. The long spines are moved to entrap small metazoan prey..push prey into that huge funnel mouth openning..that funnel mouth snaps shut.

This rotifer has a poorly ciliated corona.
by charlie g
Sat Jan 27, 2024 4:03 am
Forum: Pictures and Videos
Topic: Under the 1/24 ice , mesocosm collection.
Replies: 31
Views: 3006

Re: Under the 1/24 ice , mesocosm collection.

Dinoflagellate wonderfully pigmented, and quite active..I chased this active winter protozoan for delightful and challenging image captures. Fresh water dinoflagellates are poorly studied in north america. images: 012, 025
by charlie g
Sat Jan 27, 2024 3:47 am
Forum: Pictures and Videos
Topic: Under the 1/24 ice , mesocosm collection.
Replies: 31
Views: 3006

Under the 1/24 ice , mesocosm collection.

Hi all, in finger lakes/US we had a brief one week of below freezing temps. Good doggie and I had only to climb the hill to our : pond/stream mesocosm. Doggie not permited into this mesocosm as she might foolishly plunge onto the ice of the pond segment ( pond 1/3rd 10 ft. depth, remainder 5 ft dept...
by charlie g
Sat Jan 27, 2024 2:55 am
Forum: Miscellaneous
Topic: A discussion about experience
Replies: 39
Views: 35182

Re: A discussion about experience

Hi all, say polymerase, just this 1998 physics/ astronomy/ cosmology community embraced..yet with worries ( what are we to do in a paradigm shift?) embraced the stark 'reality' that we only understand 1/3rd of our universe, 2/3rds are : dark energy..we to 1/24 still do not know what 'dark energy is'...
by charlie g
Wed Jan 24, 2024 2:20 am
Forum: Pictures and Videos
Topic: Some arcellinid amoebae in SEM
Replies: 21
Views: 1849

Re: Some arcellinid amoebae in SEM

Wonderful microscopy sharing, bruce, thank you. A few years ago I found a few institutions with optical microscopy labs, and SEM microscopy labs , both which for a set of costs, permit non-academics to use their equipment with a lab facilitator/ mentor. Does your facility offer such pay for use of s...
by charlie g
Tue Jan 23, 2024 8:57 pm
Forum: Pictures and Videos
Topic: Arcella dentata
Replies: 9
Views: 958

Re: Arcella dentata

Thanks again, francisco, for sharing this protist image capture. Thanks too bruce (many thanks for numerous thoughts you post into threads)..I see your cited examples of colonized amoebae tests/ shells are all instances of endosymbionts harboring 'inside amoebae tests'..not epibionts attached to the...
by charlie g
Mon Jan 22, 2024 4:01 am
Forum: Introduce yourself
Topic: Hello from Pennsylvania
Replies: 7
Views: 2024

Re: Hello from Pennsylvania

Congrats, Josephus on giving your daughter a microscope. In her higher education ( should she take biology courses) , the school will supply the microscopes, and equipment and needed specimens. If you would like to complement your microscope with a vintage 'Greenough' style stereo microscope...I can...
by charlie g
Mon Jan 22, 2024 3:44 am
Forum: Pictures and Videos
Topic: Arcella dentata
Replies: 9
Views: 958

Re: Arcella dentata

Thank you francisco for sharing this testate amoeba encounter. I wonder about how heavily colonized your amoebas test seems to be...almost 'covered with fir'. Did you sense any interior cell activity, any contractile vacuoles enlarging/ then rapidly 'shrinking', any indications this testate amoeba w...
by charlie g
Thu Jan 11, 2024 7:47 am
Forum: Beginner's corner
Topic: Inverted scope
Replies: 14
Views: 13805

Re: Inverted scope

Hi again, greg. I'll plop some pics in this thread. A finite inverted microscope: "Olympus Tokyo Cka", ready to use...out of the box, $170+ shipping. I'm central NY. charlie g
by charlie g
Tue Jan 09, 2024 1:32 am
Forum: Beginner's corner
Topic: Inverted scope
Replies: 14
Views: 13805

Re: Inverted scope

Hi again, greg, are you located: con-US? charlie g