136 THE MICROSCOPE. 



Itjems, 



Mr. Tolles claims to have made objectives with tapering fronts 

 over ten years ago. 



Send to our advertisers for a catalogue and see if they have 

 anything new. Keep posted. 



Eugene Pinckney, of Dixon, 111., will exchange rubber cement 

 of his own manufacture for good slides. 



Mr. J, Lee Smith, of New York city, prepares slides of embryo 

 chicks that "seem to be absolutely perfect." 



Mr. Crisp, of London, describes a microscope made fifty years 

 ago. It was four feet high and had a tube four inches in diameter. 



A bulls-eye condenser can be made from an old fashioned 

 bulls-eye watch-glass filled with glycerine and covered with plate 

 glass. 



Our new work on Microscopical Diagnosis is now ready to 

 be delivered. Please notice the clubbing rates in our advertising 

 pages. 



Mr. Stewart, of London, found Amoebce crowded with refractile 

 points. They were distinctly crystalline in character and had a 

 vesicular nucleus. 



Volvox globator, mounted alive in glycerine jelly, as cool as 

 possible, will keep well with but slight loss of color. Also if mount- 

 ed in Canada balsam. 



Our subscribers can help us very much by asking their friends 

 to send us a dollar for a year's subscription. The more dollars you 

 send us the better the journal we will send you. 



Langfeldt has found that half a gramme of citric acid to one 

 litre of water will kill all organisms in impure water — except cyclops 

 — in two minutes, and not injure the water for drinking purposes. 



In the Rev. Mycologique, IV. 1882, pp. 194-200, the French 

 scientist, C. Roumeguere, notes the rapid progress of microscopy in 

 the New World, and makes special reference to the work of the edi- 

 tors of The Microscope in the University of Michigan. 



