90 THE ameeica:^ Monthly [April, 



NOTES. 



King's Cements. — It is gratifying to note the favor with which Dr. 

 King's cements are meeting. They are not fancy preparations of uncer- 

 tain value, but are adapted to all practical microscopic mounting. The 

 red "lac cell and finish" is particularly adapted to deep cells, and 

 the transparent and white zinc to thin ones as well as to the finishing 

 of the mount. These cements are economical, they run smoothly and 

 are very useful for excellent work. 



To Mount the Tongue of a Fly. — J. E. Huber gives the follow- 

 ing method : The insect should be beheaded with a sharp instrument 

 and the head immediately immersed in liq. potassa. After a few days 

 soaking the tongue will be seen protruding. Then wash and mount 

 in the usual ways. Staining may be done with carmine to bring out 

 the details. 



Mounting Media for Perishable Crystals. — Prof. Johnson, of 

 Johns Hopkins University, recommends, as adapted to this purpose, 

 one of the following: i. Finest copal resin dissolved in chemically 

 pure amylic alcohol. 2. Finest copal dissolved in pure absolute alco- 

 hol. 3. Damar resin dissolved in rectified spirit of turpentine. No 

 heat should be used in making these solutions, which should be very 

 thick fluids. 4. Damar resin dissolved in balsam copaiba. 5. Boiled 

 chian turpentine dissolved in balsam copaiba. 6. Damar resin boiled 

 until the rising scum becomes nearly dissipated, the remaining scum 

 to be removed with a spoon. — Pharmaceutical Era. 



Paris Exhibition, 1889. — The following English opticians obtained 

 rewards at the last Paris Exhibition, though not necessarily for micro- 

 scopes alone : 



Grand Prize. — Messrs. Ross & Co. 



Gold Medals. — Mr. J. H. Dallmeyer, Mr. J. Pillischer, and Messrs. 

 Watson & Sons. 



Typographical Errors over the word Microscope. — The Jour- 

 nal of the Royal Microscopical Society for February, calls attention to 

 the " Orthography of the Microscope," citing a series of errors it has 

 noticed, and remarking upon them as follows : 



There is no word which is so variously spelt as "Microscope" or 

 (with " Microscopical," &c.) so often misspelt by printers. The form 

 " Miscroscope" occurs times out of number. The Germans, apart 

 from, the standard form of " Mikroskop," also spell it " Mikroscop," 

 " Microskop," and " Microscop." " Mikrospischen " is found in Steng- 

 lein's " Anleitung," 1887. 



"Microscrope " appears in Proc. Amer. Soc. Micr., 1886. " Miros- 

 copical " in Amer. Mon. Micr. Journ., viii (1887), p. 49, and in Jour- 

 nal Royal Microscopical Society, 1887, p. 1039. " Microscopial" in 

 " The Microscope," 1888, p. 108. " Mikrokopiker " in " Flora," 1888, 



P- 39- 



Breath-Screen. — In snub-nosed persons, says Dr. P. Schiemenz, 

 the expired air tends to pass down parallel to the tube during a micro- 

 scopical examination. The deposit of moisture, especially in winter, is 

 sometimes annoying, and to obviate this the author recommends the 



