101 NTOMATA. |<'ll. IV 



I... Ill aer|im."i ;,. permanent, r.u rva.1,11 I v. It) reading I,),,. 



initrumont it is boMt to note the .position of the index 



.li. i .' li -I ii.i. i -i , 10 .,i i.urly jM.od readings m;,y 

 K. l,iikcii I'V wail.mj; nnl.il lli< index romes l,o approxima.l,o 

 .r,,|, To make ;i.n ol.s, Tva lion |,|,,- leal should I,,- lixed, 

 slomaial Mide upwards, on :i, liori/.onl.n.l support, l>y IIH-JI.MH 



Wil,h die instrument, die i-xporirimiitH I IS i: a,nd I ISc 

 may I > p.. formed, m I I S li n preliminary opening "I die 



stomal.i may oil, en \>< d>,ei\ed In oeetir .il, I, he moment, 



of severing die lea.!' from I, he pla.nl,. The .-Insure of l.lii: 



lomala, in ardlidul darkne , ; , or as evening comes on ma.y 



(118 bis), The temperature of leaves in relation /<> tmns- 



pint! ion*. 



('ill a '/'/-M/MW//W leal'( IT) and wrap it, round the Lull, 

 <>l a. l,litTinoinel,or "i.nlual.ed in ( ' (1 ( '. and secure il wilh 

 .1 le-iim. I hen do I h Maine wilh a 'Iropa-oluiii leal ( A') 

 //// utttirlit'i/ (n /lir i>f<nit. As soon a ; leaf II' has had 

 lime |.o Wither, il I herinollU'l ef Will "l\e a lll"lie| ii-.idlli" 

 tli. 111 thai of A' III sunshine I. In- dilleicnee may l>e (. ( !. 

 II I, lie shmiala ol A' are made l<> close, e <. l>\ means of 

 da.rkncs, I. he I cmpei a I ui es ol A" a.nd II become praclleall\ 



I. lent ie.ll 



(118 A) MMs cobalt method 9 . 



1 1 is well known thai, paper impregnated wilJi a. : lui i<>n 

 >l a. e.ili.ili sail, e " eohalt, chloride, changes Irom hlue |. 

 red when il is placed in damp air and r.-a .siimes I he hlne 

 i when dried. Slalll has heell aide l>\ taklie; ad 



1 Kniiirin Dm win. /'////. I'l.nia., 1C... I*. IM'.IM, |> 

 Sl.jilil, /'.'/,//;. /., itiui.i, IS') I. |. I 17. 



