138 Scientific News. 7 [ February, 
the red corpuscles nucleated, the amplification employed in these 
observations was about 3700 diameters 
y observations with the vertical illuminator as above related, 
were presented to the Dunkirk Microscopical Society in a paper 
which I had the honor to read before that society some two years 
ago, on which occasion many of the observations were publicly 
repeated, since which date similar results, as to the nucleus of the 
red corpuscles, have been arrived at by others, but as far as I can 
Jel these later observers subject the blood to treatment by 
means af re-agents, etc., the direct observations, therefore, as 
oteatived with the vertical illuminator are to be prefer rred: 
point which should not be lost sight of is this, the vertical 
illuminator can only be successfully used in conjunction with an 
objective of high balsam angle; and may it not be further sug- 
gested that the use of wide angled glasses is not to be confined 
to the work of the diatomist ?— F. Edwards Smith, M.D., Cleveland, 
Ohio, Dec., 1878. 
THE WENHAM ComPRESSORIUM. — Mr. Geo. O. Mitchell, of 
Hanover, N. H., is making this useful little accessory of a some- 
what smaller size than usual, and at a less price. His instruments 
have been furnished to several colleges and to experienced work- 
ers with the microscope. They are well made, and are sent by 
mail for $1.50, or nickel-plated for $1.75. 
EXcHANGES. — Frank S. Collins, 26 Tremont street, Boston, 
Mass, would like to exchange New England for California, 
Florida and other Alge. 
:0: 
SCIENTIFIC NEWS. 
— Dr. Albert Günther, director of the zoological department 
of the British Museum, has received the gold medal of the Royal 
Society for his important researches on the zodlogy and anatomy 
of the fishes and reptiles. 
— The Polytechnic Review of Dec. 21, states that “ Prof. J. Gib- 
bons Hunt, of New York, one of the most accomplished micro- 
scopists in the country, says that it is affectation or stupidity for 
Americans to send to Europe of microscopes when they can now 
purchase better ones at hom t will surprise Dr. Hunt's 
friends to learn that he is “ of New York,” especially since the 
editor of the “ Review ” ” is, like Dr. Hunt, a citizen of Phila- 
delphia. 
— We learn that the Princeton Geological and Palæonto- 
logical party met with excellent success during the past season. 
They visited the region of the Mammoth Buttes, east of the 
Green river, in southern Wyoming, which was explored by Prof. 
Cope in 1872, and obtained fine series of Loxolophodon cornutus, 
Paleosyops vallidens and other species. They will be able to fur- 
oe nish much additional iniormiatoh as to the structure of these 
