292 KEINICKEj "^Z. NEUERN Ml KROSKOPI E." 



that some unknown great good is derived from 

 the union of individuals which have been kept distinct for 

 many generations/" — J. R. G. 



The reader is requested to correct tlie following errata: — page 176, line 

 2, for germination read gemmation; page 183, line 4 (of table), {ox being 

 read rarely; line 13 from bottom, for Holophrya read Holophyra ; page 

 183, line 2, after a read single ; line 9 from Ijottom, for Cothurina read 

 Colhvrnia ; page 184, line 27, for radiating read running ; page ]85, line 3, 

 iov Rkonchylosiotna read Kondylosloma ; line 17, for The read Thus; page 

 186, line 26, for Spirostonum read Spirostonmm ; page 187, last paragraph, 

 and page 188, the first complete paragraph, to be marked with cpiotations ; 

 page 189, line 5, for on read of; line 16 from bottom, for construction read 

 contraction ; line 6, ditto, for continued read continue; page 190, line 3 

 from bottom, for complete read complex ; page 191, line 17 from bottom, 

 for great I'eatl granular. 



Beiti'iige zur neuern Mikroskopie. By Von Fihed. Reinicke. 



We welcome the appearance of another part — the third — of 

 Professor Reiuicke's useful contributions to microscopy, and 

 the more Avarmly because the present part contains some 

 observations of greater interest,, perhaps, to English micro- 

 scopists than were those embraced in the former parts. Judi- 

 cious as were the previous notices, and useful, no doubt, 

 as they would be to many, they were, for the most part, of 

 too elementary a nature to be of much interest to the majorit)^ 

 of English microscopists, who, furnished so abundantly by 

 our microscope makers with every variety of contrivance and 

 adjunct to the instrument, would not require to be told much 

 of the very simple matters which have formed, for the most 

 part, the subject of M. Reiuicke's former lucubrations. 



In the present part, however, we observe several things 

 which will be found as interesting and useful to many in this 

 country, as in Germany; and of the substance of these 

 observations we shall proceed to give a brief summary. The 

 subjects treated of, are — 



1. A cheap Polarizing Apparatus. 



2. Observations on Nobert's Test and Modern Objectives. 



3. On Atmospheric Micrography, 



4. On a New jNIethod of making Preparations. 



5. Miscellaneous Notices. 



1. The polarizing apparatus described and recommended 



