428 REpoRT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
which can be verified by the hydrometer. For spraying for the 
San José scale and the leaf blister-mite, dilute as follows: 
For San José scale, use one gallon of the concentrated 
solution with eight or nine gallons of water, employ- 
ing the former strength when considerable infestation 
exists. The stronger mixture should give a reading on 
the hydrometer of 4.4 or 4.5 degrees B. or about 
1.030 Sp. G. 
For blister-mite use one gallon of the concentrated solu- 
tion with eleven gallons of water. The diluted mix- 
ture should test on the hydrometer about 3.5 B. or 
1.026 Sp. G. 
BRANDS OF VARYING STRENGTH. 
With mixtures of varying densities determine the strength 
of the clear solution by the hydrometer, and mark the reading 
on the container. In using this stock solution for strong mix- 
tures for the scale or for the blister-mite, dilute in the propor- 
tions given in the accompanying table. 
TABLE IV.— TARLE FOR DILUTING SOLUTIONS OF VARYING CONCENTRATION. 


Amount of dilution. 
Number of gallons of 
water to one gallon of 
lime-sulphur solution. 
Reading on hydrometer. 

: Specific For San For 
Degrees Beaumé. gravity. José scale. | blister-mite. 
5c sere Moe Ae Riacaas eR ON: ane aR Steet ne Ca ets, ie eae 1.3181 1to9 tons 
Sack te eee kine coe atl @ cite tee eee ete ee 1.3063 1“ 84 LF Ake 
oF RRR coe ah ie Sty Tie URES At Net Rr. bel ae eBstm 1.2946 ys Le 
832 .:i ee desea! Abbie ee cede Al ee ee 1.2831 tt ie at ee 1 “ 104 
se ah ibis eatin genes eth Rat ita lak oo aie fn SR A Re 1.2719 i ey £5 ihe ks ayy) 
rT ME NiO! RRR ERE Tat EOS 1.2608 1“ 7 1 “ oh 
AS EE Ea Cs bey Me $d ela 8 Saki edie cai Ay Ch Peo celine ee: 1.2500 ‘tacos A owed 
DR is Aas ae gag | I ake oh rr aaah Ma a Bes cle ihe sso Leos 1 8 
OT os AER TE CE CRG e Bhar hae ree 1.2288 1 a6 I tae y 
DE ice boise le A oO Pe his ese 1.2184 Lo“ 5 1 “ 72 
A; mm a Lt gD Eo ae aan Od ES es eR 1.2083 1 “ 54 | etna 25 
DAP ef) 8 ee SR Aen ees Role NT, ee Sen ee 1.1983 1 bt pA 7 / 
1 a AME. eet AL rte wh RA AER Reig hy iis ol igs 1.1885 1 “ 43 1 “ 62 
DD 8k hone. Ges sbie all RAB ee ian RL fe eee ee 1.1788 ee os 1 64 
1: See Fae tT te po dns Oe Ta ah 1.1693 1 “ 44 1 “ 53 
DOIN Bes ESS eae Me ERE ere Ee 1.1600 Lied 1 es 
TA MRR MEMO AL AED Ser ye 1.1507 1“ 33 1 “5 
PRY Oe Peet. te bs oes Sir Ue eee ae eRe ee 1.1417 IN Te tr 1 “ 42 
Te ea yee ke ee 1/1328 1“ 3 1“ 4} 
DORR Pe oes eee i eee eo aE cee eee 1.1240 eet 12% 1 44 
DERE RC EAN cn cal ost Aphis Ky apes lose esac, ta baat de Rena ear Lelio Liao roe 

