LIST AND CONTENTS OF BULLETINS 1 TO 100. 31 



• 



removal of the edj^e of the joints; handlino- the ])hiiits — I'ear maehinery : 

 Origin of pear maehinery; pear exitters ; pear burners — Pear for milk ])ro- 

 duetion : Some dair^' rations including- pear — Pear for fattening and main- 

 taining- cattle — Pear as a hog- feed — -Pear for sheep and g-oats — Pear as a 

 ration for working- animals^ — Effect of pear upon stock — ("actus for the silo — ■ 

 Pear thickets and their destruction — Species of cactus which are of forag-e 

 value — Establishing jjlantations of pear — Yield of pear — Beha\ior of jjear after 

 harvesting — Other economic aspects of the cacti — Some conditions obtaining 

 in the prickly-pear region — Popular postulates of cactus feeding — Description 

 of plates. 



No. 7."). Range Maiiagenieiit in the State of "Washington. By J. S. 



Cotton, Assistant in Range Investigations, in Cooj^eration 



with the AVashington State Experiment Station. 15)05. 



28 pp., 3 pis. Price, 5 cents. 



Contents: Introduction — Uange improvements: Winter jiastures ; semiarid 

 lands; mountain grazing areas — Protection of pastures — Alternation of jjas- 

 tures — Using pastures before ground is settled in the spring — Improvement of 

 stock — Index of grasses and forage plants — Description of jilates. 



No. 7^). Copper as an Algicide and Disinfectant in Water Snpplies. 



By (xeorge T. oNIoore, Physiologist and Algologist in 



Charge of the Laboratory of Plant Physiology, and Karl 



F. Kellernian, Assistant in Physiology. 1905. 55 pp. 



Price, 5 cents. 



Contents : Introduction — Difference in toxicity of copper sulphate in labo- 

 ratory and field conditions — P^ffect of copper sulphate upon fish — Conditions 

 determining the proper quantity of copper sulphate for eradicating alg-te — 

 Appearance of resistant forms of algje in reservoii's previously treated — Odor 

 and taste due to large nuuibers of alg;e killed — Reports from various cities and 

 towns upon the effect of treatment : Baltimore, Md. ; Bond Hill, Cincinnati, 

 Ohio ; Butte, IMont. ; Cambridge. X. Y.. ; Elmira, N. Y. ; Fieldhome, N. Y. ; 

 Glencove, Long Island, IV. Y. ; Greenwich, Conn. ; Hanover, X. H. ; Hanover, 

 Pa. ; Ivorydale, Ohio ; Johnson Creek, Wis. ; ^tiddletown, N. Y. ; Millersburg, 

 Pa. ; Moncton, New Brunswick ; New Y'ork, N. Y". ; Newtown, Pa. ; Oberlin, 

 Ohio; Passaic. N. J. ; Port Deposit. Md. : PJiinebeck, N. Y\ ; Scarboro, N. Y. ; 

 Springfield, 111. ; Waltham, ISIass. ; Water Mill, Long Island, N. Y. ; Wellsboro, 

 Pa. ; Winchester. Ky. ; Winnebago City, Minn. — Necessity for determining the 

 polluting organism — Troublesome forms and their identification : The Sedg- 

 wick-Eafter method of quantitative determination ; key for identifying 

 algae — Method of applying copper sulphate — Sterilization of bacteria-polluted 

 water by means of copper sulphate — Sterilization of the water supplies at 

 Columbus, Ohio, and Albuquerque. N. Mex. — Sterilization of water by means 

 of metallic copper — Copper in the disposal of sewage — Copper supplementing 

 the use of filters — Copper treatment and filtration at Anderson, Ind. — Objec- 

 tions to the use of copper sulphate — Opinions of toxicologists upon the effect 

 of copper sulphate — Medicinal use of copper — Conclusion — Summary. 



No. 77. The Avocado, a Salad Frnit from the Tropics. By G. N. 



Collins, Assistant Botanist in Investigations in Tropical 



Agricultnre. 1905. 52 pp., 8 pis. Price, 5 cents. 



Contents : Introduction — Origin and history : Early accounts ; common 

 names; not native in the West Indies; distribution — Description— Botanical 

 affinities — Varieties — Geographical types : Guatemala ; Porto Rico ; Mexico ; 

 Costa Rica ; Ciiba ; Hawaii — Culture : Propagation by seed ; asexual propaga- 

 tion ; soil ; climate ; cultivation ; improvement ; shij^ping qualities ; uni- 

 formity ; extension of season ; seed reduction ; texture; flavor; yield; size; 

 resistance to cold — Diseases — The avocado in Porto Rico — The avocado in 

 Hawaii — The avocado in Florida — The avocado in California — Bearing age 

 and life of tree — Y'ield — Harvesting : Time to pick ; method of gathering ; 

 packing and shipping — Cold storage — ISIarketing : Market season — Methods of 

 eating — Food value — Cos-t cf production — Summary — Description of plates, 



2739— No. 101—07 3 



