Boohs recently published. 
XI. 
MARSHALL. 
Price 4 d., or by post 5 d. 
THE NEW WATER WEED ; 
ANACHARIS ALSINASTRUM. 
Some account of it ; 
By William Marshall, Esq., of Ely, Oamb. 
XII. 
RAINEY. 
In 12 mo. price 3s. 
AN EXPERIMENTAL INQUIRY 
Into the cause of the Ascent and Descent of the Sap. 
With some Observations upon the Nutrition of Plants, and 
the Cause of Endosmose and Exosmose. With plates. 
By GL Rainey, m.u.c.s.e., Demonstrator of Anatomy 
and Microscopic Anatomy, St. Thomas's Hospital. 
XIII. 
RALPH. 
Price 3s. 6d. ; or coloured , 7 s., 
ELEMENTARY BOTANY, 
For the use of beginners. By T. S. Ralph, a.l.s., etc. 
Mr. Ralph’s Botany for beginners is favourably noticed 
by reviewers generally, and has been adopted by H.M.’s 
Committee of Council on Education. 
