1894.] MICROSCOPICAL JOURNAL. 187 



ground glass and substituting a small camera devoid of lenses. 

 Focus very carefully in this case. Use the Carbutt-Ortho plate, 

 3ix4 inches and expose H to 2i minutes according to strength 

 of light. Develope with Hypodeveloper. 



MICROSCOPICAL MANIPULATION. 



Snowflake Pictures. — Anthony's Bulletin says that a Mr 

 Sigson has photographed snowflakes as follows : 



A Zeiss microscope, fitted to a long camera, was placed at a 

 considerable angle in the attic of a house, near to the window. 

 To gather the flakes separately, a thick cloth was laid in that 

 part of the window where but few flakes fell. After selecting a 

 flake by the aid of the microscope, it was placed in a net made 

 by gumming cotton thread across a hole cut in a card, this 

 card being placed in position under the microscope. The light- 

 ing should be from the side, and should be arranged before- 

 hand, so that half of the field is lighted. With a magnification 

 of 15 times, an exposure of 2 to 5 seconds was found necessary. 

 To prevent the snowflake being melted by the breath of the op- 

 erator breathing must be carried on through a curved tube. 



Aniline Stains may be removed from the skin by acid or 

 hypochlorite, but the better mode is to wash first with a 5 per 

 cent solution of sodium chloride, then with h^'^drogen peroxide 

 and finally to rub with a cloth moistened with alcohol. 



Ringing Mounts. — For ringing mounts there is nothing 

 neater, cleaner or more convenient for use than liquid shellac. 

 Use the liquid pure without any admixture whatever. While 

 the slide is upon the turn-table apply the liquid with a fine 

 brush and finish with the point of a knife blade. Rings thus 

 finished look almost as if made of solid glass. If a fancy mount 

 is desired, paint a design on the slide and run the ring over it, 

 as above. These rings make a handsome finish, which every 

 one will admire. One can prepare the liquid himself. It may 

 be obtained at a varnish factory or procured from dealers in 

 microscopic supplies. 



Bleaching Animals and Sections Fixed with Osmic 

 Mixture. — Dr. Carazzi, of the Spezia Civil Museum, gives the 



