BY R. GREIG SMITH. 347 



The liquefied area becomes naiDiform and shows clear, opalescent 

 and white portions. 



Glucose-gelatine stab. — The medium is partly consumed and 

 partly liquefied, showing an air bubble and a crateriform liquefied 

 area bearing a film. The needle track below the liquefied area is 

 white and filiform. The liquefied area becomes funicular and 

 the sunken film becomes wrinkled. No gas is produced in the 

 body of the medium. 



Potato. — ThQ growth appears as white or yellow-white, dry, 

 dull or glistening crusts; these fuse together to form a wrinkled 

 expansion which ultimately becomes pasty. 



Bouillon. — The medium is clear or faintly turbid; a loose floccu- 

 lent deposit and broken surface ring is formed. The indol reac- 

 tion was obtained. In-nitrate-bouillon, the nitrate is not reduced. 



Milk. — The medium is partly, then completely peptonised, the 

 reaction being faintly alkaline. The milk is not made ropy. 



Summary. — From the peach, the almond and the cedar, races 

 of an organism, Bacterium 2^&i'sicce, n sp,, were separated. The 

 organism produced a slime when grown upon solid media or in 

 fluid media containing saccharose. When grown upon solid 

 media the saccharose could be replaced by many other carbo- 

 hydrates and by glycerine. The essential carbohydrate of the 

 slime was soluble in water, but upon drying became readily 

 altered to an insoluble modification. The carbohydrate hydro- 

 lysed to arabinose and galactose, the latter predominating. The 

 carbohydrate occurred in small amount in the gum exuded from 

 one of the trees in which the organism was found. Besides 

 forming the galactan-arabinan gum, the organism inverted the 

 saccharose and produced ethyl alcohol, carbon dioxide, lactic, 

 butyric and traces of succinic, formic and acetic acids. 



Although the carbohydrate hydrolyses to arabinose and galac- 

 tose, I do not consider that it belongs to the arabin group. The 

 gums of this group are, by treatment with water in the autoclave 

 at three atmospheres' pressure, readily and completely dissolved. 

 I have found this to be the case with metarabin and with par- 



