large spectroheliograph - India

highfnum · Post by **highfnum** » Thu Nov 07, 2019 5:16 pm

cool video

look at item at 1.51 mark

https://www.youtube.com/watch?v=v5QKV2CKazw

Carbon60 · Post by **Carbon60** » Fri Nov 08, 2019 7:10 am

A really interesting watch, John. I love the fact that old data, collected on antique equipment, still has a scientific role to play.

Stu.

Post by **Montana** » Fri Nov 08, 2019 10:39 am

My goodness! is your spectroheliograph that big highfnum? I don't think I could fit one in my house

Alexandra

highfnum · Post by **highfnum** » Fri Nov 08, 2019 5:00 pm

Naw!
about 60cm long and 3.18Kg

Post by **marktownley** » Fri Nov 08, 2019 9:52 pm

I enjoyed the video JOhn

highfnum · Post by **highfnum** » Sat Nov 09, 2019 1:14 pm

highfnum · Post by **highfnum** » Thu Nov 14, 2019 4:13 pm

well shopped around the antique sites
picked up a glass 1922 photo from kodaikanal
cak

highfnum · Post by **highfnum** » Thu Nov 14, 2019 4:15 pm

with a little computer magic

Post by **marktownley** » Thu Nov 14, 2019 6:59 pm

Holy smokes Batman! Looks at all that plage!!!!

highfnum · Post by **highfnum** » Thu Nov 14, 2019 11:02 pm

oops! feb 22 1926

george9 · Post by **george9** » Fri Nov 15, 2019 12:29 am

Thanks. So nice to see that, and neat that you found it. You can look up the daily sunspot numbers for that day: 41 was recorded.

George