386 Miscellanies. 
the surface subsequently smoothed with a thin coat of mortar, simi- 
larly composed to that above described; the use of hydraulic lime is, 
that the beton and mortar may set more rapidly. When the whole is 
quite dry, and not till then, the Mosaic pattern may be set out in the 
mortar, and by means of flat iron bars, rings, &c. of the proper thick- 
ness (about half an inch) the moulds are formed, into which the fluid 
mastic is poured, and spread as before described.” pp. 11, 12, 13. 
8. Rafinesque’s Botanical Works——(Communicated.)—Professor 
Rafinesque of Philadelphia, began to print and publish in 1836, two 
great botanical works, which he states to be the result of his botani- 
cal researches for forty years, since 1796, in the two hemispheres. 
The first is Frora Teiiuriana, or Synoptical Mantissa of two 
thousand new or corrected families, genera and species of plants, from 
all parts of the earth, and thus the first work ever published in Amer- 
ica, upon the general botany of both hemispheres. Three parts of 
three hundred and six pages, large 8vo. have been published already. 
One of one hundred and four pages, containing the introduction, nat- 
ural classification, and generic rules; the second of one hundred and 
twelve pages, and the third of one hundred pages, include eight hun- 
dred new or revised and corrected genera and species with some new 
natural orders. He has particularly revised the families of Saxifra- 
- a Gentianea, Poly gones, Asphodelides, Helonides, Orchides, Astor- 
ides, Atriplexides, Labiate, Resedines, &c. This work is supple- 
mental to De Candolle and Lindley, and contains many American 
genera. 
The second work is New Frora anp Botany or Nortn AMER- 
ica, supplemental to all other American floras, containing the gen- 
era and species omitted or mistaken by Pursh, Michaux, Torrey, 
Hooker, Beck, Elliot, &c. Three parts have also been published, 
forming a half volume of three hundred pages, 8vo. The first con- 
tains the introduction, geography, lexicon and monographs; the sec- 
ond, a historical sketch, and Neophyton of three hundred new or re- 
vised species of herbaceous plants, whereof eighty six are monoco- 
tyledons; the third, sylvan sketch and new Sylva of two hundred 
and thirty four new or corrected trees and shrubs. There are several 
complete Monographs of the genera Celtis, Morus, Spirea, Hydran- 
ea, Hamamelis, Fagus, Forestiera, Ceanothus, and some new genera, 
Nestronia, Cladastis, Nudilus, Zanthyosis. Also, monographs of 
Lechea, Amphicarpa, Kuhnia, Peltandra, Eclipta, Crotalaria, Cap- 
sella, Baptisia, Gerardia, Iris, Tradescantia, &c. 
Both are sold by the author, for one dollar each part, or five dollars 
for the six parts already published. We understand that he accommo- 
