Larsiv luvts aro inlVrior for sujjju' pnHliutiow. Plu^ si.o vioUl 

 inji uiosit ^ujiar wol^iihs* fwm ouo to n\o i>oiuuls. djoiiiil* laoiorios 

 tlo not nsuallv ivjtvi Invts woiiihinjr as lamh as (hroi> iHMiniis. 

 Tho luvis wluoh havo oouio umlor our obsorvation havo variini in 

 woijihr fn>n\ sovt^x ouiuHHfs to (hiw poumis aiul iwolvt' oiuu^s, [\\o 

 avorajio boiuj: a fraotiou of an oum't^ oviM' ouo i>i>uu(l. 



v< TlMK OK Pl.AM'lNO ANO 1 1 AK V KS I I Nii. 



Tlu' main oousidoratiou (o bo kopt iu uiiutl in this Siah> in 

 iv^i^HVl 10 liuio of plauuuji- sujj-Jir boots, is lo allow sufluitMit linio 

 for ivmploto umturiuii'. Takiuii- our soasous as tbov avtn-aiiv. tho 

 plautiuii- can usually bo douo iu May. In plautiuji lator thau Juno 

 1. muoh risk is iuv'urroil iu rx^toiouro to iho luopor ripoiiiuu of iho 

 avp. 



Hot'oro Uarvosiiui:. iho boois should ripou ^-ouipUMoly. siui'o iui- 

 matuiv btvts ooutaiu U^s supir ihau ilio ripo ouos. Ai maiuriiy 

 tho loavos turn yollowish giwMi and tbo outor ouos bond di>\vu 

 about iho boot. It rvH|uiivs about loO days for a oroj* ti> dovoK>}> 

 its liighost sug-ar ooutoui. varyiu^ir. of oourso. with tho oharaotor 

 of tho soasou. llarvostiuji' luust lako plaoo boforo tho soooud 

 liTowth v'ommouoos. siivoo this dooroasos tho aiuouui of sui;ar. 



11. riKirv OF SOI. IPS in .iiiok. 



Whilo tho porooutajio of sujiur oouiaiuod iu a boot is hisiiily 

 iui];H>rtaut. it is not thoouly faoior (hat dottaauiuos tho »\uality of 

 tho bo<a. Tho puritu of tho siWids iu tho sutiar boot juioo uiust bo 

 oousidorod also. r»oot juioo ooiuaius bosidos sujiar othor sub- 

 stauoos iu soUuioti. To illustrato. tho juioo of a oortaiu saiuplo of 

 sujj:;ir boots ooutaius I'J.S por oout of sugar aud IS.- [ua- ooui of 

 total solids, iuoludiujr suirar aud othor luatorials. This loavos ."i.l 

 jHn* oout of solids not sugar, llaviug tho por oout of sugar aud 

 tho iHM- oout of total solids. lun\ do >Y0 stato tho purity of tho juioo? 

 Wo divido tho por oout of sugiir (12.8) by tho por oout o\' lotnl 

 solids ^IS.'J) ai\d tho produot. oxpn^sed iu pans por huudrod. is 

 7l); aud this wo oall tho " (^oot^ioioitt of ruriiv." which utav bo 



