1010] FORESTRY. 151 



the varieties planted on the station grounds the following have crown host: 

 Wiltz, Franquette, Mayette, and Chaberte walnuts, and rabst, Moneymaker, 

 Stuart, BUBSeron, Major, and Mantura | ans. 



A new variety of avocado, the ''Chinin," G. Itie {Agron. Colon., S (1918), 

 No. 20, pp. 42-44' f'ffs- 8). — The author describes a group of avocados (Per sea 

 gratisaima) obtained from thp State of Tabasco, Mexico, the fruit of which 

 differs so much from the ordinary avocados that the group has been given the 

 name "Chinin." Four types of this group are described. The " Chinin " is 

 distinguished from the avocado by its wrinkled skin, by the constitution of 

 the endocarp, which is always thick and resistant, and by the texture and 

 flavor of the pulp. The most common type is very elongated, pear-shaped in 

 form, and often resembles a calabash in appearance. 



Lemon orchard from buds of single selected tree, A. D. Shamel (Jour. 

 If credit n. 9 (1918), No. 7, pp. 318-320, figs. 2).— The author recently examined a 

 •in acre Lisbon lemon orchard near Porterville, Cal., set out in 1907, with trees 

 all grown from buds of a very productive and valuable parent tree. Not one 

 off-strain tree was found in this orchard, whereas in neighboring Lisbon lemon 

 orchards, where no bud selection based on performance records and intimate 

 tree knowledge had been practiced in propagation, it was found that from 10 

 to 70 per cent of the trees were of variable or off-type strains. 



Orange-like fruit from a lemon tree, T. W. Brown (Jour. Heredity, 9 (1918), 

 No. 7, pp. 308-310, figs. 3). — The author describes a lemon tree growing in the 

 gardens of the Ministry of Agriculture, Cairo, Egypt, that bears orange-shaped 

 fruit. The fruits are lemon in color, but many of them are characterized by a 

 raised longitudinal orange-colored line on one side. 



One of the branches developed a large fruit which resembled an orange both 

 in appearance and taste. The tree was supposed to be a typical Italian lemon. 

 It is suggested that the bud from which it was propagated may have been 

 takfn from a lemon-orange hybrid tree. 



A fruiting orange thorn, A. D. Shamkt, and C. S. Pomeboy (Jour. Heredity, 

 9 (1918), No. 7, pp. 315-311, figs. 2).— The fruiting orange thorn here illus- 

 trated and discussed was observed on a Washington navel orange tree. The 

 authors state that through the selection of buds for propagation from thorn- 

 less limbs, or those having small thorns, considerable progress has been made 

 in isolating thornless strains. 



Pyrethrum and its culture, IT. Faes (he Pyrcthre ct Sa Culture. Lausanne: 

 Sta. Yit. Lausanne, 1918. pp. 7, figs. 2). — This article contains a brief account of 

 the species of chrysanthemum (Chrysanthemum cineraria folium) furnishing 

 the Dalmatian insect powder, together with the results of experimental cul- 

 tures in different localities in Switzerland and general directions for growing 

 pyrethrum. 



FORESTRY. 



Value of scientific research in forestry, C. F. Korsttan (Trans, rtah Arad. 

 Sri., 1 (1908-1917), pp. 186-194) .—A paper on this subject read before the Utah 

 Academy of Sciences, April 6, 1917. 



Some present-day problems in forestry, E. R. Hodson (Trans. Utah Acad. 

 Sci.. 1 (1908-1917), pp. 45-54)- — A popular discussion of various problems re- 

 lating to forestry, and dealing especially with forest areas in Utah, Nevada, 

 and southern Idaho. 



Forestry work, W. H. Whelt.ens (London: T. Fischer Umrin. Ltd.. 1918. pp. 

 236, figs. 17). — An elementary treatise on the principles and practices of silvi- 

 culture, with special reference to British conditions, 



