138 Scientific Intelligence. 
repeated revisions, it may be expected that equal experience will reveal 
similar imperfections in the new and untried work. None but a prac 
stances of its production, or such as pertain to all works of the kind, im 
which knowledge is progressive, the records of this knowledge widely 
dispersed, and the facts to be observed and digested into order almost in- 
finitely numerous. An introduction gives a good condensed sketch of 
this group of plants, and a technical synopsis of the genera and species, 
—of much importance therefore to the systematic botanist, Since is 
Venezuelan plants, No. 2223, referred to on p. 17; and Mr. Bentha 
. l 5 aa 
3. Reports on the Natural History, Clicwiile and Physical Geography 
of Minnesota, Nebraska, Washington, and Oregon Territories ; A 
connection with the Survey of a Pacific Railroad Route, along the forty 
seventh and forty-ninth parallels of latitude, in 1853-4—5-6, u o 
_ command of Governor I. I. Sreveys, of Washington Territory ; by = 
Suck ey, M.D, and J. G. Coorsr, M.D., Surgeons and Naturalists 
the Expedition, 4to, pp. 399, 26, with 65 plates, and isothermal ¢ . 
oie ‘ 
