966 



EXPERIMENT STATION RECORD. 



Cacao; experiments in drying at Dominica {Agr. Neivs lB(irJ>ndos'\, 1 (1902), 

 No. 6, p. 85). — By the aid of a dryer maintained at the temperature of 110 to 120° F., 

 cacao was successfully dried within 24 hours. 



CofFea stenophylla, P. von Romburgh {Teysmannia, 12 {1901), No. 12, pp. 605- 

 610). — The dithculties surrounding the culture of Arabian coffee have led jjlanters 

 to turn to several means of relief. Hybrids between the Arabian and Liberia cof- 

 fees have been tried with some success and the methods of grafting the Arabian on 

 Liberia stock have l)een jierfected. But the author thinks there is room for improve- 

 ment, and to this end suggests Cnffea i<teiiophylhi, by some considered as a variety of 

 C. arahica. C. stenopJit/lhi has Ijeen grown at the Buitenzorg gardens and has fruited. 

 It gives promise of being valuable, and further trials are under way. — h. m. pieters. 



Silkworm food plants — cultivation and propagation, G. W. Oliver ( U. S. 

 Dept. Agr., Bureau of Plant Indutitry Bid. 34, p))>. '0, ph. 13). — Methods of propagat- 

 ing mulberries from seed and by cuttings, root grafts, shield budding, and by scion 

 or sprig budding, are described and illustrated, and suggestions made regarding the 

 soil for nmlberries, planting, and j)runing. The subject is treated from the stand- 

 point of mtilberries as food for silkworms. Osage orange leaves form a suitable food 

 for silkworms when the worms are given an opportunity to select the leaves them- 

 selves, but when young and immature leaves are fed they have a tendency to sicken 

 the worms. "Ignorance of this fact renders the use of the osage orange dangerous." 



Fourth, report on experiment in pinehing' raspberry shoots, F. Cranefield 

 ( WiscoiiMn Sta. Bid. 1 902, pp. 259-267, fig^i. 3) . — The author has investigated the value 

 of the practice of jiinching the tips of growing raspberry shoots to induce branching 

 and fruitfulness. The earlier results obtained in this work have been previously 

 noted (E. S. R., 13, p. 953). The following table shows the yields obtained in 1902 

 and the average yields for 4 years with the Gregg and Cuthbert varieties. In each 

 experiment there were 36 plants. 



Yield of ntspberrie.^ on pinched <md iionpinched nhoots. 



Shoots not pinched 



Shoots pinched at 12 in 



Shoots pinched at 12 in., laterals at 12 in 



Shoots nut pinclied , 



Shoots pinclied at 18 in 



Shoots iiiiiclu'd at 18 in., laterals at 12 in 



Shoots not jiinched 



Shodts jjinclied at 24 in 



Shoots pinched at 24 in., laterals at 12 in 



Gregg. 



Yield, 

 1902. 



Ounces. 

 446.8 

 407. 5 



1,000.9 

 402. 5 

 560.6 

 491.8 

 452.6 

 502.5 

 602.8 



Average 



of 4 

 .seasons. 



Ounces. 



954.7 



795.1 

 1,118.7 



814.1 

 1,150.8 

 1,046.6 



962.8 

 1,261.4 

 1,182.4 



Cuthbert. 



Yield, 

 1902. 



Ounces. 

 397.4 

 347.7 

 408.7 

 527.0 

 419. 

 415.8 

 841.3 

 750.2 

 658.4 



Average 

 of 4 



Ounces. 

 970.2 

 830.5 

 857.7 

 996.4 

 864.7 

 908.3 

 773.4 

 992.9 

 773.7 



This table shows that the largest average yield of the Gregg variety was obtained 

 from the row pinched once at 24 in. Averaging the results of 4 years, for the 2 rows 

 pinched 12 in. there was a yield of 956.9 oz., for the 2 rows pinched 18 in. a yield of 

 982.4 oz., and for the 2 rows pinched 24 in. a yield of 1,221.9 oz. For the 3 rows 

 not pinched the average yield for 4 years was 907.2 oz. These results indicate that 

 the yield of the Gregg variety has been increased by pinching. With the Cuthbert 

 variety the 3 rows not pinched yielded an average of 913.3 oz. ; the 2 rows pinched 

 at 12 in. 844.1 oz. ; the 2 rows pinched at 18 in. 886.5 oz.; and the 2 rows pinched at 

 24 in. 883.3 oz. Pinching with this variety appears to have decreased the yield. 



An account was kept of the number of shoots and suckers produced on plants dif- 

 ferently treated. The data presented indicate that pinching increased the production 

 of shoots in the Gregg variety and decreased the production of suckers in the Cuth- 

 bert variety. A table is given showing the effect of pinching on the size of the ber- 



