122 THE MICROSCOPICAL NEWS. 
downwards, upon its surface for thirty minutes, then wash in dilute 
Nitric Acid (1 to 3) until all perceptible colour is removed. Wash 
in distilled water to remove all trace of acid. Float again, sputum 
downwards, upon a little of the Crysotdine stain, wash in distilled 
water, then immerse in absolute alcohol to remove all trace of 
water. 
The preparation is now ready for mounting permanently, and a 
drop of liquid Canada Balsam may be placed upon the cover glass 
and then laid carefully upon a glass (3 by 1-in.) slip, and the spirit 
in the Balsam allowed to evaporate, or if wanted for immediate 
examination a little shellac may be run round the edges of the 
cover glass.” 
MANCHESTER MicroscopicaL SociETy.—The annual meeting 
of the Manchester Microscopical Society was held on Thursday, 
Feb. 22nd, at the Mechanics’ Institution, Princess-street, under the 
presidency of Mr. William Blackburn. ‘The report of the com- 
mittee for the past year, which was read by Mr. C. L. Cook (the 
honorary secretary), stated that the members of the Society now 
number 214. ‘The ordinary meetings had been well attended, and 
papers regularly read. The mounting-class and the rambles had 
been more than usually successful. After the officers and council 
for the ensuing year had been elected, Mr. Blackburn delivered an 
address, in which he stated that he had been very unwillingly 
pressed into the service. It had been the unanimous wish of the 
Society that Mr. Davis, well-known as the editor of THE Micro- 
SCOPICAL News, should have been president for the year, but Mr. 
Davis, in consequence of his numerous engagements, did not see 
his way to add to his responsibilities, and, therefore, under these 
circumstances, he felt bound to accede to the wishes of those 
(especially Mr. Davis himself) who were desirous that he should 
occupy the chair for the year. 
Mr. Blackburn, in his address (to be found as this month’s 
leader) spoke of the influence of microscopical research on the 
progress of natural science and on our well-being, and concluded 
with an epitome of the recent researches on the septic and patho- 
genic organisms, and the rational explanation they afford of the 
sources and communicability of infectious and contagious diseases. 
CARLISLE MICROSCOPICAL SociETy.—A meeting of members of 
the Carlisle Microscopical Society was held in the Young Men’s 
Hall, Fisher-street, on Friday night, when a paper was read by Dr. 
Hall, vice-president, on “ Z'vichina spiralis.” Mr. W. Brown was 
to have prepared the paper, but through the pressure of his profes- 
sional duties was unable to do so, and the subject was kindly taken 
up by Dr. Hall. In speaking of Trichinosis he said :—The disease 
could be clearly made out after death in cutting up the carcase ; 
