314 _ General Notes. [May, 
of the State, and it will be a great pity if the public sentiment of the 
State is disregarded by its executive. A topographical survey of New 
York by one of the leading geographers of the country would be a model 
for other states to follow. 
. MICROSCOPY.! 
A Foreten View or American Microscopy. — Mr. Henry Crouch, 
the well and favorably known London optician of that name, who spent 
a considerable part of last summer at Philadelphia in the double capacity 
of a British commissioner and an exhibitor, improved the opportunity to 
become acquainted with many of our microscopists, and to study the 
various styles of instruments exhibited at the Centennial. His contribu- 
tion on the subject, addressed to the Queckett Club after his return 
home, is of more than ordinary interest on account of his special and 
technical knowledge of the subject, his position as a fellow exhibitor, to 
which he candidly alludes as a peculiar feature in the case though not a 
motive to control his statements, his comparative independence. of local 
sympathies and prejudices, and his evident feeling of good will and cor- 
diality towards those whom he met while here. He heartily acknowl- 
edges the hospitable treatment received in this country, and intimates 
that a vacation spent here is a rare pleasure, a statement which elicited 
from the president of the club a hearty assurance of reciprocation in case 
any of our microscopists should visit London. 
Mr. Crouch mentions with pleasure and surprise the interest and 
promptness with which the progress of microscopy in England is fol- 
lowed up in this country. He notices the large number of students of 
diatoms, due, he suggests, to the great abundance of the fossil deposits 
here, and the comparative unfamiliarity with other forms of pond life. 
He regrets, as we do, the absence from the circle of exhibitors of some 
eminent competitors for success in the same department of manufacture.” 
The very general adoption of the Jackson form of stand in this coun- 
try, which has always been a fact, Mr. Crouch regards as an encourag- 
ing confirmation of his uniform belief and practice ; the continental model 
being used, as far as he noticed, only by those who employ the micro- 
scope in some narrow specialty, and for the most part without accesso- 
ries. The same remarks would apply to the binocular, and they are 
certainly correct if the specialties be understood to include histology and 
pathology, for which many of the English and American accessories are 
not needed, or at least not popular. As further peculiarities of the 
1 Conducted by Dr. R. H. Warp, Troy, N. Y. 
2 The opinion having b din the Naruratist, December, 1876, page 730, 
that the insinuation. that Tolles’ lenses were not exhibited at Philadelphia because 
they would not be properly examined there, must have been authorized without 
siders it justifiable and proper. 
