ZOOLOGY AND BOTANY, MICBOSCOPY, ETC. 1041 



duty, while "Microscopes and microtomes are ' manufactnres of metal,' as ruled 

 by the Washington wiseacres in opposition to the opinions of the best scientific 

 men of the country. ... A more reasonable interpretation of existing laws, or 

 better, a revision and a reduction of the present duties, would tend generally 

 towards the advancement of American science and the promotion of American 

 honesty."] 



Amer. Natural., XXI. (1SS7) p. 922. 

 Cutter, E. — [The Microscope and Old Age.] 



[■' I hi^pe that the Microscope may not be relegated to the younger members of our 

 profession alone. It is an instrument for old age. Ehrenberg worked with liis 

 Microscope up to within a few days of his death. The focusing accommodates 

 the defects of vision. Moreover, it is a comfort and solace to an aged phvsician 

 to quietly explore the mysteries of tlie unseen world he has beendealiiig with 

 microscopically during a long and laborious life. May it be a good preparation 

 for that endless life where we shall no longer see through a e:lass darkly.'"] 



2ncroscope^ YII. (ISST) p. 28-1. 



GoRECKi. — Du Microscope applique a Tetude de la Mineralogie et de la Petrographie. 



Mineralogie micrographique. (The Microscope applied to the study of mineralogy 



and petrography. Microscopical mineralogy.) Svo, Paris, 18S7. 



Microscopical Studies, Pursuit of. by Amateurs. 



[Discussion of the question ■• How can a man who uses the Microscope, and studies 



pursued by its aid as a means of recreation, retain his interest in the subject ? '] 



Anier. Mon. Micr. Journ.. YIII. (18S7) pp. 197-8. 



Microscopy in Calcutta. Sci.-Gossip, 1SS7. pp. 229-30. 



Necmaxx. C— Die Brillen, das dioptrische Fernrohr und Mikroskop, Ein Handbuch 



tur praktiiche Optiker. (Spectacles, the dioptric telescope and Microscope. A 



handbook for practical opticians.) 



xxxii. and 232 pp., 95 figs., Svo, Wien, Pest, Leipzig, 1887. 

 [OsBOBN, H. L.]— Microscope in Medicine. 



A ..cT. J/;.;!. J/i>r. Journ., YIU. (1887) pp. 15.=i-6. 

 BoTSTOX-PiGOTT, G. W. — Microscopical Advances. XXY., XXVI., XXYII. 



xxYin. 



[Butterfly dust ; villi and beads ; its isolated beading and reticulations ; reticula- 

 tions and crossbars ; ulrimate beading and woof.] 



£ji<}l. Jlech., XLYI. (1S87) pp. 101-2. 173-4, 245-6, 291-2 (4, 10, 5, and 8 figs.). 

 Yeblot, B. — Le Guide du Botaniste herborisant. (Guide for the collecting botanist.) 

 [Contains descriptions of Microscopes, i'c] 



3rd ed. with introduction by Xaudin, xvi. and 776 pip. and 34 figs., 



12mo, Paris, 1886. 



'p. Technique.* 

 CD Collecting: Objects, including- Culture Processes. 



Cultivation of Chaetomium.t — For the cultivation of Chaetomium 

 Kunzeanum, says Dr. F. Oltmanns, plum decoction is more suitable than 

 that of dung, as bacteria develope in it less easily. In order, to determine 

 whether the formation of a pollinodium ceases in the asco^onium, the 

 examination of a dead cidtivation does not suffice ; recourse must be had to 

 cultivations which allow continual observation of a particular carpofouium. 

 Cultivations in moist chambers in hanging drops as they are usually carried 

 out are impracticable, for the fungus stands in need of much oxycjen. The 

 mycelia are rarely brought to the fructification, for before this occurs a 

 cessation of their general growth takes place, and even if the perithecia are 

 actually formed it is not of much use, as these prefer to arise fi-om mycelia 

 projecting into the air, or are as near the culture-drops and air as possible 

 — positions unattainable with high powers. To observe an asco^onium for 

 a long time, nothing remains but to keep the ordinary slide-cultivations in 

 the usual way under moist bell-jars until spores are formed. A suitable 



* This subdivision contains (1) Collecting Objects, including Culture Processes ; 

 (2) Preparing Objects; (3) Cutting, including Imbedding and Microtomes; (4) Staining 

 and Injecting ; (5) Mounting, including slides, preservative fluids, ,!cc. ; (6) Miscella"^ 

 neous. 



t Bot. Ztg., xlv. (1887) Nos. 13-7 (1 pi.), tf this Journal, ante, p. 791. 



