@misc{65858,
note = {{http://vlp.mpiwg-berlin.mpg.de/library/data/lit814
0/index\_html?pn=14\&ws=2.5\&mk=0.0655/0.7042\&wid=dig
i\_2844 http://vlp.mpiwg-berlin.mpg.de/library/data
/lit8140/index\_html?pn=11\&ws=3.0\&mk=0.7995/0.5441\&
wid=digi\_8399 Seems to be M99: "Micrometric
shutter for studying minute fields of color. After
Münsterberg. By Elbs, Freiburg. \$42." See (Elbs
fig. No. 10) http://vlp.mpiwg-berlin.mpg.de/librar
y/data/lit13692/index\_html?pn=4\&ws=1.5 and
description "Mikrometerblende": http://vlp.mpiwg-b
erlin.mpg.de/library/data/lit13692/index\_html?pn=1
\&ws=1.5}},
url = {https://vlp-new.ur.de/images/img30219}
}
