140 : 



SUMMARY OF CUERENT RESEARCHES RELATING TO 



genus, SpirobactcriacesB, with subgenera Vibrio and Spirillum. B. Bacteria 

 with formation of arthro-spores (including those the mode of fructification 

 of which is not yet known) : 1st genus, Arthro-coccaceae, with subgenera 

 Arthro-streptococcus, Leuconostoc, Merista, Sarcina, Micrococcus, and 

 Ascococcus ; 2ud genus, Arthro-bacteriaceas, with subgenera Arthro-bac- 

 terium and Spirulina ; 3rd genus, Arthro-spirobacteriacese, with subgenus 

 Spirochaete ; 4th genus, Leptothrichete, with subgenera Leptothrix, Creno- 

 thrix, and Phragmidiothrix (?) ; 5th genus, Cladothrichese, with subgenus 

 Cladothrix. 



MICROSCOPY, 

 o. Instrujnents. Accessories, &c.* 



(1) Stands. 



Bulloch's Student's Microscope. — In this instrument, by Mr. W. H. 

 Bulloch, of Chicago (fig. 1), the stage is connected with the stem by means 



Fig. 1 



*Thi8 subdivision cxmtains (1) Stands; (2) Eye-pieces and Objectives; (3) Illumi- 

 nating Apparatus ; (4) Other Accessories ; (5) Photo-micrography ; (6) Manipulation ; 

 (7) Microscopical Optics, Books, and Miscellaneous matters. 



