HORTICUJ.TURE. 637 



Binging an unsafe stimulus to fruit bearing, F. II. Hall {,Veiv York tslalo 

 Sia. Bill. S91, poinilar cd. (UU.'i), pp. Jf). — A popular edition of the above. 



Spraying- farm orchards by the club plan, R. I). Jay and W. M. Cook 

 (Ohio Stii. Circ. t.'/S {IDl-'/), pp. -}.7-5^). — Tliis ciiciilar de.scribes a cost account- 

 in;^' oxiicriniout conductwl by the station in cooperation with the Greene County 

 Improvcnicnt Association in order to secure data relative to the community 

 s[)rayiMfj: of orchards by one man. An itemized account is j;ivon of the over- 

 head charges connecteil with the work, together with an Itemized statement <jf 

 the expense incurred in sin-aying one orchard and summarized statements of 

 the cost in the seven other orchards. 



The total cost per tree for three sprays was 4-l.o cts. and the tolal amount 

 of spray material required per tree for three sprays was 0.7 gal. lime-sulphui 

 and 0.2 lb. lead ar.sennte. The average number of trees sprayed per hour was 

 18, including flic time spent in mixing the material and filling the tank. Under 

 favorable conditions it was found possible to spray 300 trees in a day. The 

 total rental charges for the spray outfit amounted to $58.80, which allows 6 per 

 cent ou an investment of $150, as well as 20 per cent depreciation, and leaves 

 about $18 a year for repairs, insurance, and storage charges. 



Some suggestions based on the present work are given with a view to assisting 

 those organizing orchard spraying clubs. 



Spraying program for orchards with combinations recommended, W. J. 

 Green, A. D. 8klby, and II. A. (k)SSAKu (Ohio »S7.«. Vire. l-'fO (UU5), pp. GS- 

 60). — This circular contains schedules for .siiraying orchards of apple, pear, 

 plum, and peach, the directions being based upon many years of observations 

 and experimental testing. 



Spray treatment, etc., for orchards, W. E. Britton and G. P. Clinton (Con- 

 necticut State Sta. Bui. IS-'t (1914), pp. 3-12).— This bulletin describes the gen- 

 eral spraying practice for the treatment of the apple, pear, peach, plum, cherry, 

 and quince, and gives directions for making spray mixtures. 



Spray calendar, W. E. Britton and G. P. Clinton (Connecticut State Sta. 

 Bui. ISS (1915), pp. 32, figs. 63). — ^This calendar contains directions for the 

 control of the more important insect pests and diseases of orchard and small 

 fruits, vegetables, and other plants, including also formulas for the preparation 

 of spray mixtures. 



Tree fillings and wound dressings for orchard and shade trees, A. D. Selby 

 (Ohio Sta. Circ. 150 (1915), pp. 61-63). — This circular describes the process of 

 filling cavities in branches and trunks with a composition of asphaltum and 

 sawdust, ;i method originated by J. Boddy. Instructions are also given for 

 dressing wounds with gas tar and liquid asi»haltum. 



Thinning apples, H. J. Eustace (Michii/an Sta. Circ. 2.) (Wl.'f), pp. 158-160, 

 figs. 2). — This circular contains practical suggestions relative to thinning apples. 

 Some data are given showing the time required to thin fruits of four Wealthy 

 apple trees. On one tree 2.980 fruits were removed in two hours time. This 

 tree yielded 19 bu. of marketable fruit and 2.5 bu. of culls at harvest time. 



An inquiry into the nature of a somatic segregation of characters in the 

 LeConte pear, W. P. Tufts (Oregon Sta. Bui. 123 (1914), pp. 4-16, figs. 6).— 

 The author cites several recorded instances of variation of characters in 

 somatic tissue, and gives the results of a study conducted with the LeConte 

 pear with the view of throwing some light ou the general laws underlying 

 somatic variations. The somatic segregation here considered has to do with 

 the relative deciduousness or persistence of calyx lobes in the lieConte pear. 

 Ob.servations were made throughout the fruiting season on the crop of one 

 tree, amounting to 5,396 fruits, each of which was considered as 5 fruits when 



