444 'I'liH JorKXAi. OF UhkI'Ditv 



Remarks: A fair fruit for market i)urposes, Fk^sh: Deep i)ink. 



but such pomelos as Marsh Seedless are Peel: Thick; more than average, 



superior. Lenticles: Large and numerous. 



Fiber: More than average. 

 Fruit No. 4. Siamese Seedless Pomelo {Citrus Grain: Small and firm. 



decumana). Seeds: None. 



Taste: Bitter. 

 Size: Very large. Citrus quality projjortionately poor. 



Color: Yellow. 



NEW PUBLICATIONS 



Die Ziichtung der landwirtschaftlichen Kulturpflanzcn, von C. Fruwirth. Band V, Die Ztich- 

 tung kolonialer Gewachse. PP. viii, lS-4. Berlin, Paul Parey, 1912. Price, M. 10. 



This volume of Dr. Fruwirth 's encyclopedic work on plant breeding treats in 

 detail of the most important plants cultivated in German's colonial possessions — 

 namely, sugar cane, rice, millet, coffee, cacao, citrus species, cotton and other fiber 

 ])lants, \'ams, manioc, peanuts, olives, sesame and the oil palm. Each culture is 

 in efifect, monographed by a specialist. Dr. Fruwirth himself being responsible for 

 only a few of the contributions. The book, like all those that Dr. Fruwirth has 

 produced, covers a field not adequately treated by anyone else, and covers it in a 

 way that leaves little to be desired. It is technical in scope, but to genetists who 

 are' interested in tropical products from a practical i)oint of view, it should be almost 

 invaluable. 



Breeding Australian Opossums 



That the Australian o]jossum {Triclwsurus vulpicula) might be bred in the 

 United States with profitable results is the belief expressed in a communication 

 from B. Harrison of Burringbar, N.S.W. The name "oi^ossum" applied to this 

 sjiccies is almost a misnomer, since he is widely different from the North American 

 animals to w'hich it projjerly belongs. The Australian opossum is a nocturnal, 

 arboreal animal, living on eucalyi)tus leaves, tender shoots, and such fodder. He 

 is easily domesticated, and takes kindly to a diet of grain and fruit. His thick and 

 woolv fur commands a ready sale, while the flesh is excellent, particularly if the 

 animal has been fattened on corn. The black Tasmanian opossum yields a still 

 more valuable fur, but Mr. Harrison thinks that either one could be bred easily 

 and successfully in most parts of the United States. 



Standards for Graphs 



With a view to standardizing the methods of constructing graphs in u.se by men 

 of science in the United States, so that their construction and interpretation may 

 be simple and uniform, and their use therefore more widesj^read and ]x:)]ntlar, the 

 American Society of Mechanical Engineers has taken the lead in the formation of a 

 Joint Committee, to consider the whole subject and make suitable recommenda- 

 tions. As biological as well as jihysical sciences are now widely interested in the 

 use of graphs, the A.S.M.E. has asked the president of the American Genetic 

 Association to appoint one member of the Joint Committee to represent this associa- 

 tion. Charles B. Davenj^ort of (^old S])ring Harbor, Long Island, N. V., has been 

 named to act in this capacity. 



