174 THE MICROSCOPE. 
occupy much more than the limited space at our command. The 
various tower clocks of his construction, with and without the auto- 
matic illuminating apparatus, the odometer, the current metre, his 
improvements in the construction of type-writers, and many other 
inventions, are existing monuments of his mechanical skill and 
versatility. 
To microscopists Mr. Fasoldt was best known from his 
ingenious detaching nosepiece, and the remarkable micrometer 
rulings, which have provoked no little discussion among scientists. 
This work was taken up after several years of almost total abstinence 
from all exacting watchwork, which Mr. Fasoldt was obliged to 
relinquish on account of the failure of his eyesight, the result of a 
cold. In 1878, however, his eyes were completely restored to their 
normal condition and he set about constructing a machine for ruling 
on glass with a diamond. So great was his success in this that he 
finally succeeded in producing scales ruled a million lines to the 
inch. 
In 1861 Mr. Fasoldt removed to Albany, where the remainder 
of his life was spent. : 
As a man, Mr. Fasoldt was full of life and enthusiasm. Being 
well informed on all subjects his mind was a sort of storehouse from 
which his friends were accustomed to draw information, his large 
experience and genial nature making him the most agreeable of 
companions. During the last few years of his life he devoted much 
time to the microscope and was never tired of exhibiting the powers 
of that wonderful instrument. 
CHAS. FASOLDT. 
WM. A. ROGERS. 
ICROSCOPISTS will hear of the death of Mr. Fasoldt with 
unfeigned regret. The work which he has done in fine rul- 
ings and in micrometry entitles him to a better recognition than he 
has received. While there may be a difference of opinion in regard 
to his skill in the production of test plates, as compared with Nobert, 
it must, I think, be admitted that he has made some plates which 
are quite as good as the best of Nobert’s. When it is remembered 
that he must have been more than fifty years of age before he took up 
the problem of micrometric rulings, and that he had had no previous 
knowledge of the subject, his success has certainly been most 
remarkable. 
Two circumstances have acted as a hindrance to the recognition 
