Maps of soot. #books #maps From "Nature", 17 November 1893. pic.twitter.com/k83MOzBjso

— JF Ptak (@ptak) April 25, 2021

from http://twitter.com/ptak
on: April 24, 2021 at 11:45PM

Holy cow: penetrating power of 16.5" shell from 110-ton gun–Scientific American, May 1896. pic.twitter.com/DphATgeWLa

— JF Ptak (@ptak) January 22, 2021

from http://twitter.com/ptak
on: January 22, 2021 at 02:52PM

Interesting and scarce document relating to #Austria, #WWII, 1944. #books https://t.co/DG46OVwC7t

— JF Ptak (@ptak) September 10, 2020

from http://twitter.com/ptak
on: September 10, 2020 at 01:40PM

Bad story about Arecibo being heavily damaged by a broken cable. #astronomy https://t.co/P4ei2zb4jo

— JF Ptak (@ptak) August 12, 2020

from http://twitter.com/ptak
on: August 11, 2020 at 11:19PM

COVID-19 deaths in the U.S. are equal to about 6% of all US military deaths since the beginning of the country.

— JF Ptak (@ptak) May 11, 2020

from http://twitter.com/ptak
on: May 11, 2020 at 01:24PM

A bad ad–the optically-challenging bit on HB Stowe's "My Wife and I…" in "American Agriculturalist" for 1870. #books pic.twitter.com/gz7ooDtJsd

— JF Ptak (@ptak) April 6, 2020

from http://twitter.com/ptak
on: April 06, 2020 at 10:05AM

Another nice aviation cutaway from "Popular Mechanics" 1937–the China Clipper. There's a nice round-the-world aviation map to go with this showing fueling stops at Wake, Guam, Midway–a peep into why those unheard-of places would be major news in 6-7 years. #aviation #dataviz pic.twitter.com/U5ZmQktIWK

— JF Ptak (@ptak) February 28, 2020

from http://twitter.com/ptak
on: February 28, 2020 at 09:59AM

Book cpovers/dustjackets using a hand motif: #books #bookstore pic.twitter.com/ZGvUeq32DP

— JF Ptak (@ptak) February 5, 2020

from http://twitter.com/ptak
on: February 05, 2020 at 10:08AM

"Russland", a nasty piece of Nazi propaganda. #WWII #Russia https://t.co/k9KMrkTjYr pic.twitter.com/DFSPG63vdx

— JF Ptak (@ptak) February 5, 2020

from http://twitter.com/ptak
on: February 05, 2020 at 09:58AM

Very little is held back in this diatribe by Rep. Clare Hoffman against the Commie-ridden CIO. The America-Firster Hoffman also fought the polio vaccination program beginning in mid-50's (Commie-ridden), & etc., and worked badly w/Ds+Rs alike in his 30 yr House career. #books pic.twitter.com/3dGHG7AfCO

— JF Ptak (@ptak) January 16, 2020

from http://twitter.com/ptak
on: January 16, 2020 at 09:59AM