48 FKOSERPINA. 



sap in its upward course." I dare say ; but I don't kno\\ 

 yet what its composition is before it begins going up. 

 " The Elaborated Sap by Mr. Schultz has been called 

 * latex. 5 ' : I wish Mr. Schultz were in a hogshead of it, 

 with the top on. " On account of these movements in the 

 latex, the laticiferous vessels have been denominated cin- 

 enchymatous." I do not venture to print the expressions 

 which I here mentally make use of. 



15. Stay, here, at last, in Article 264, is something to 

 the purpose : " It appears then that, in the case of Exo- 

 genous plants, the fluid matter in the soil, containing dif- 

 ferent substances in solution, is sucked up by the extremi- 

 ties of the roots." Yes, but how of the pine trees on yon- 

 der rock ? Is there any sap in the rock, or water either ? 

 The moisture must be seized during actual rain on the 

 root, or stored up from the snow ; stored up, any way, in 

 a tranquil, not actively sappy, state, till the time comes 

 for its change, of which there is no account here. 



16. I have only one chance left now. Lindley's " In- 

 troduction to Botany." < Sap,' yes, ' General motion 

 <af.' II. 325. " The course which is taken by the sap, 

 after entering a plant, is the first subject for consideration." 

 My dear doctor, I have learned nearly whatever I know of 

 plant structure from you, and am grateful ; and that it is 

 little, is not your fault, but mine. But this let me say it 

 with all sincere respect is not what you should have told 

 me here. You know, far better than I, that c sap ' never 

 does enter a plant at all ; but only salt, or earth and water, 



