1870.] MICROSCOPY. 115 



the colours required and the dyes to be prepared from it. The 

 process of production is carried on with machinery of a special 

 character, which has been designed by the patentees, Messrs. 

 Walker & Co., for this manuf<icture. — Builder. 



Chemical Analysis of a Sample of Extract of Meat. — 

 An analysis of extract of meat by Herr Reichardt is given in 

 Dingleys Polytecknisclies Journal. The sample was prepared by 

 a private firm, and yielded, on analysis, the following results : — 

 Portion soluble in alcohol (of 83 per cent, strength), 80-76 per 

 cent. ; water, 16 per cent.; fatty matter, 0-2 per cent.; nitrogen, 

 9-99 per cent. ; ash, 21-36 per cent, (containing potassa, 9-0 per 

 cent. ;) soda, 2-3 per cent. ; phosphoric acid, 6-1 per cent. These 

 results, as compared with Liebig's and the Fra Bentos extracts, 

 are stated by the author to be in favour of the extract tested by 

 him for MM. Buschenthal k Co. 



MICROSCOPY. 



Butterfly Parasite. — In the March number of this 

 Journal, attention was drawn to the existence of a vegetable 

 parasite on the legs of the dark Swallow-tail Butterfly (^Fnpil'io 

 asterias). The facts are as follows: — 



At a meeting of the Montreal Microscopic Club some time ago, 

 the subject for illustration and examination was " Parasite — 

 Animal and Vegetable." 



Looking over my collection previous to the meeting, for ex- 

 ample of the subject, I had occasion to open a small box containing 

 four specimens of Papilio asterias, and observing something 

 attached to the legs of one of the butterflies, it was subjected to 

 microscopic examination, and I concluded it would suit the subject 

 for investio-ation at the meetino- of the club. 



One leg with the parasite was mounted in balsam — the cover 

 being secured with sealing wax varish, a very useful cement when 

 an object is wanted for immediate use, as it dries quickly. 



Members dift'ered in opinion as to the objects — the general 

 impression that it was a vegetable parasite, fungoid in its nature, 



