1S9;}.] 



MICROSCOPICAL .lolIiNAL. 



87 



Washing-Bottle For Microscopical Sections. — Tiic ac- 

 conipiinvin^ sketch of Maw's a|)paratiis tor washiii}^ sections 

 sliows an arrangement lliat lias been t'ouiul to he an iini)r(jve- 

 ment upon that ilescrihed hy Marsh in his hook on Section Cut- 

 tin*; Instead of ihiliin*; a hole in the side of the bottle for 

 overllow. a siphcjn tiirou^li the cork is used. This draws the 

 water otl' at or near tiie centre and does away almost entirely 

 with the chance for thin sections heinj; cauj^ht a*;ainst the hole 

 in tile side — an objection to Marsh's appaiatus. A is the bottle, 

 X the funnel. C the siphon, and D the india-rubber tubin*; 

 connectiiii; tlie funnel with the side of tiie bottom of the i>ott!e. 



A Convenient Life-Slide. — The slide illustrated above is 

 placed on a turn-table and a cell of melted bee's-wax made. 

 The object is placed in the centre and a thin glass cover put on 

 and pressed down hard with a piece of thick plate-glass, other- 

 wise the slide can be inverted and pressed on anv hard Hat sur- 

 face till the cell is in contact with the cover all around. 



One often finds verv interesting objects, and with this slide can 

 mount them so they will be ready for re-examination if called 

 away. Thev will remain alive and in good condition from one 

 dav to a week. — Mcvcr Bros.' Druggist., Nov.^ l8g2. 



MK HOS(()PI(AL MAMPl LATION. 



Two Methods of Detecting Tubercle Bacilli in Milk. — In 

 examining milk which is suspected to contain the tubercle bacillus, 

 it is usual to subject a sample of the milk to the action of a cen- 

 trifugal machine after separating the fat. The casein in 20 c. c. 

 of milk is coagulated with citric acid, and, after filtering, the 

 residue is dissolved in a solution of sodium phosphate. The butter- 

 fat is separated bv shaking with 6 c. c. of an aqueousether solution. 



