NOTES AND QUERIES. I2I 
examination led to the detection of a ‘‘measle” ( Cysticercus Solium cellulose ) 
in the boy’s brain, identical with the porcine measle dealt with at last meeting, 
but of extraordinary size—that of a Hazel nut. Dr. Spencer Cobbold reported, 
that after removing the cyst, the head measured two inches in length. Some 
remarks were made concerning the very favourable opportunity the so-called 
Sanitary Committee of the Newcastle Corporation were likely to afford to 
students of the germ theory of disease—should they, as proposed, bring the 
Fever Hospital Buildings in close proximity to Bath Lane Schools. The 
medical gentlemen present regarded this inexplicable action of the Corporation 
as a very serious matter, and were unreservedly of opinion that such an institution 
should be isolated as far as practicable. In illustration of the paper read, 
Messrs. J. Brown, John Arthur, and John Brown, junr., showed vegetable 
structure treated with reagents. Mr. J. G. Dickinson exhibited a series of pre- 
parations under polarised light—shewing gradual development of crystals in 
cuticle underneath carapace of prawn—apparently the result of the concretionary 
aggregation of the calcifying deposit, forming the future shell. A vote of thanks 
was passed to the chairman for presiding. 
NOTES AND QUERIES. 
MosseEs.—Mounted Slides.—I shall be thankful for a few hints 
on mounting, with names of books and price, or any other informa- 
tion on the same.—Cafgax. 
PALMAM QUI MERUIT FERAT.—In the article on Photo-micro- 
graphy in our April number, we alluded to several Daguerreotypes 
taken by Professor Draper, U.S.A., in 1851—1856, as “probably the 
first attempts at photo-micrography”; but from certain facts and data 
which have been put before us, we find that in July, 1840, Mr. J. 
B. Dancer, of Manchester, publicly exhibited during a lecture at 
the Liverpool Mechanics’ Institution, the mode of taking photo- 
graphs of microscopic objects,—a flea being magnified by the gas 
microscope to the size of six inches, and a photographic image of 
it taken on a silver plate during the progress of the lecture. He 
also took photographs of sections of wood and fossils, both 
on chloride paper and on plates, by means of the solar microscope. 
But Mr. Dancer’s name is more intimately connected with micro- 
photographs than with these gigantic productions. In April, 1859, 
he exhibited before the members of the Manchester Photographic 
Society a page of printing, from Quekett’s “Treatise on the Micro- 
scope,” reduced to such size that the whole of the volume of 560 
pages could be contained in a space one inch long and half-an-inch 
broad—the page contained 2118 letters. Two pages of Quekett’s 
“Treatise on the Microscope,” reduced to one-sixteen hundredth 
part of a superficial inch; they included 3631 letters, and at the 
same rate the whole volume could be contained in a space of 
three-eighths of an inch square. ‘This specimen excited consider- 
able attention, being so exceedingly minute, notwithstanding which, 
