leirathemartian:charleyparkhurst:zooophagous:nudityandnerdery:free-parking:cyanometer, c. 1789, an i
leirathemartian:charleyparkhurst:zooophagous:nudityandnerdery:free-parking:cyanometer, c. 1789, an instrument that measures the blueness of a skyThe 1700s, more efficient with shitposting than Tumblr in 2012.Are you shitting meWait this is actually really interesting!!!Yeah sky color is a good way to tell humidity and to a certain extent altitude. Legit tool! -- source link
#interesting#18th century#1780's#sky#colour#science#history