ABSTRACTS. 



237 



Pollination in Orchards. By S. W. Fletcher (Cornell Univ. 

 Agric. Exp. St. Ball. 181 ; twenty-one illustrations). — The Bulletin is 

 divided into two parts, the first dealinpf with the incidental or occasional causes 

 of loss of fruit ; and the second, and more important, with self-sterility in 

 fruit trees. It is suggested (amongst other things) that in planting new 

 orchards varieties should be mixed ; that in the case of old and sterile 

 orchards it might prove profitable to put a few grafts of another variety 

 in each tree, and that while fruit trees should be well fed, yet over- 

 stimulation is apt to produce an over-vigorous growth of vegetative shoots. 



D. II. 



Pollination of Vicia pannonica, M. B., and V. striata, M. B. 



(Bei. Bot. Cent. bd. 10, ht. 8, p. 189). — Dr. Taliew describes a peculiar 

 arrangement of the carina in these Vetches adapted to withdraw pollen 

 gradually.— r;. F. S.-E. 



Port Royal Mountains, Jamaica (Garden, p. 223; 80/3 1901. 

 By W. J.). — An interesting article on plants peculiar to special times of 

 the year.— il. /. C. 



Portugal, the Botanical Reg'ions of. By A. Moller (Bol. Sue. 

 Brot. xvii. p. 97, 1901). — An excellent sketch of the principal features of 

 the flora of the various botanical regions present in Portugal ; indicating 

 also the relations of the Spanish-Portuguese flora with that of neigh- 

 bouring countries. Abridged from Willkomm's " Grundziige der 

 Pflanzenverbreitung auf der iberischen Halbinsel." — G. M. 



Potash. Muriate of, as Manure. By J. J. Willis (Gird. Marj. 

 2470, p. 128 ; 2 8 1901).— Note describing the nature of this artificial 

 manure, and its action upon organic and inorganic matter in garden 

 soils.— TF. G. 



PotatOS, Manuring. Anon. (Gard. Mag. 2468, p. 104 ; 

 16/2/1901). — Abstract of results of experiments in manuring potatos 

 with various kinds of artificial manures carried out at five stations in 

 Yorkshire. Mr. J.H. Burton, B.Sc, of the Yorkshire College, has read a 

 paper on the subject before a meeting of agriculturists at Stamford 

 Bridge.— TF. G. 



Potato Sets, Greening-." By A. Gant (Gard. Chrcn. p. 18; 

 12/1/1901). — x\ short article arguing against there being any utihty in 

 the common practice of " greening." — G. S. S. 



Potato Tubers. Supposed Fungoid Origin of (Gard. Chron. 



p. 300; 11/5/1901).— Discussion of Noel Jjcrnard's theory in a 

 leading article. — G. S. S. 



Primula megaseaefolia. Anon. (Gard. Mag. 2480, p. 287; 

 11 /5/1901). — A descriptive note with illustration of this rare and beautiful 



