350 NOTICES OF BOOKS. 
means of estimating its height, so dense was the neighbouring forest, 
above which, however, it towered in majestic grandeur. This noble 
Swamp-gum is still growing, and shows no signs of decay ; it should 
be held sacred as the largest growing tree. The largest Oak on record 
is the Cowthorpe, in Yorkshire, which is 48 feet in circumference at 
3 feet from the ground. Some hollow pollard Oaks are larger, such 
as the Winfarthing, in Norfolk, which is 70 feet at the ground.—The 
second tree, also a Swamp-gum, is prostrate. It measures, from the 
root to the first branch, 220 feet, and the top measures 64 feet, in all 
284 feet! without including the small top, decayed and gone, which 
would carry it much beyond 300 feet. The circumference at the base 
is 36 feet, and at the first branch 12 feet, giving an average of 24 feet. 
This would allow for the solid bole 10,120 feet of timber, without 
including any of the branches. Altogether, as green timber, it must 
have weighed more than 400 tons. The Oak that gave the most timber 
was the Gelonos Oak, in Monmouthshire, which, with its branches, 
turned out 2,426 feet, but the body alone only 450 feet. 
“Tomas J. Ewine.” 
LEHMANN : Novarum et minus cognitarum stirpium Pugillus nonus addita 
nova Recensione nec non enumeratione specierum omnium generis Po- 
TENTILLARUM earumque Synonyma locupletissima ; auctore CHRIS- 
TIANO LEHMANN. Hamburgi, 1851. 
This is a quarto pamphlet of seventy-two pages which is very accep- 
table to every botanist. The first twenty-three pages are devoted to 
descriptions and observations of twenty new species of the genus Po- 
tentilla, from various parts of the world, known to the indefatigable 
and talented author, and the rest of the brochure is occupied by an 
enumeration, with synonyms and references to works in which are de- 
scribed all the known species, amounting to no less than 193. The 
whole are well arranged; primarily into sections, “ FRUTICULOSJE 
et Surrruticos# ;” and * HerBaceæ.”” The first contains twelve 
. species. The second section is divided into “TERMINALES” and 
_ " AXILLIFLOR# ;” and these again into Series ; and again into “ Tribes ” 
and ^ Subtribes.” 
