822 SUMMABY OP CURRENT RESEARCHES RELATING TO 



the following solution: — Methyl-green, 1 gramme; distilled water, 

 30 grammes. After about ten minutes' maceration, the sections 

 are withdrawn and placed to decolour in a large test-tube filled with 

 distilled water for half an hour, the water being shaken and changed 

 two or three times. 



When the water is very clear, it should be stirred with a glass 

 rod, and on holding the test-tube against the light it is very easy to 

 distinguish with the naked eye the sections containing Trichince. 

 These j)resent themselves under the form of small, dark-blue, elongated 

 spots, methyl-green staining much more deeply the cysts of the 

 Trichince than the rest of the tissue. 



It is sufficient to ezamine the sections with a power of 50, and if " no 

 Trichince are found, one may be absolutely certain that the meat does 

 not contain any." 



Bolton's Living Organisms. — Mr. T. Bolton continues his praise- 

 worthy efforts to supply microscopists with a variety of living organ- 

 isms, animal and vegetable. Several which he has sent out were 

 entirely new to science, while others were new to England. His port- 

 folio of drawings has now reached its tenth number. Microscopists 

 subscribing to Mr. Balton's " bottles," may certainly feel that apart 

 from the practical return which they receive for their subscription, 

 they are doing a real service to microscopy. 



Cole's Studies in Microscopical Science. — Here, also, great credit 

 is due to the editor, Mr. A. C. Cole, for the exertions which he has 

 made to meet a want that has been felt by microscopists for the last 

 half century. During that time the cry has constantly been that, 

 though slides could be bought in profusion, no guide to their intel- 

 ligent examination was forthcoming. Mr. Cole supplies weekly, not 

 only a slide with a full description of the object, but also a coloured 

 plate. It will be a matter of very great regret if these " Studies " are 

 allowed to lapse for want of proper support from microscopists. 



In addition to the " Studies," Mr. Cole is also publishing in parts, 

 "Popular Microscopical Studies," and "Methods of Microscopical 

 Eesearch." 



Alcohol, Absolute, preparing. 



[" The microscopist can prepare an alcohol which is so nearly devoid of water 

 as to fulfil all ordinary requirements by a very simple process. Ordinary 

 blue vitriol (ciipric sulphate) is burnt or calcined until all water of crys- 

 tallization is expelled and the resulting powder is put into (95 per cent.) 

 alcohol, from which it extracts a large proportion of the water. By 

 repeating the operation several times, an almost absolute alcohol may be 

 obtained."] 



Science Record, II. (1884) p. 65. 

 Baumgaeten, p. — Beitrage zur Darstellungfemethode der Tuberkelbacillen. 

 (Contributions to the method of demonstrating the bacillus of tubercle.) 



Zeitschr. f. Wiss. Mikr., I. (1884) pp. 51-60. 

 Beegonzini. — Suir uso del collodio e del fenolo nella technica microscopica. 

 (On the use of collodion and fennel oil in microscopical technics.) 



Spallanzani Modena, XII. (1883) Fasc. 4. 

 Blackham, G. E. — Boxes for Objects. IFost.'] 



Froc. Amcr. Soc. Micr., 6th Ann. Meeting (1883) pp. 236-7. 



