128 
Reviews and Extracts.—Natural History. 
“ Accortlingly, from a knowledge of the-suhiect, acquired, virtually, by an in¬ 
vestigation of this kind, Mr. Macleay recommended that the trees in the Parks 
should he inspected twice every year, first in the summer, when the perfect insect 
is on the wing’; and secondly in winter, when those trees which were much infect¬ 
ed, lie recoiirnended to he cut down and burnt with the larvfe in them, or at least 
fumigated so as to destroy the larvae *, for to rest content with having cut down the 
trees without destroying the larvae, or even removing the trunks from the vicinity 
of the sound wood, would he, he observed, in reality, to do no good at all. The 
time hitherto selected for cutting down the dead Elms in the Parks had been just 
after all the mi.schief for the season had been effected ; and when all these nurse¬ 
ries of HuJesini had sent forth their inhabitants to the air, for the injury of such 
trees as might have remained free from infection. With respect to the less infected 
trees, when the branches were diseased, Mr. Macleay recommended them to he 
lopt off and burnt; and for those with the trunks infected, he recommended a 
coating of tar mixed with train oil, to be applied to them in March. 
“These recommendations were adopted, or similar means employed, and the 
remaining trees were happily preserved; and there can he no doubt, that, had the 
possessors of the Hartz, been, in the first instance, acquainted with the true cause 
of the disease, those forests might in like manner have been saved.” 
2. — Edinburgh Philosophical Journal. By Robert .Ja.meson, 
Regius Professor of Natural History, Lecturer on Mineralogy, &€. 
Quarterly. 8vo. Is.tod. 
^ (concluded front page 41.) 
Tuk Nitmbkr for April, contains 
Outline of a Plan for combining Machinery with the Manual Printing-Press, 
by .John Clerk Maxwell, Esq. of Middlebie, ( with a plate)—Account of a Pla- 
tina Lamp, by George Merry w'eather, Esq, of Whitby.—Observations on the 
Fossil Trees, of Van Dieman’s Land, by William Nichol, Esq. Lecturer on Na¬ 
tural Philosophy,—Account oX the discovery of Bone Caves, in Wellington 
Valley, about 210 miles west from Sidney, in New-Holland, by Dr. Lang.— 
Additional information, illustrative of the Natural History of the Australian 
Bone Caves, and Osseous Breccia, by Dr. Lang.—Descriptions of New or 
Rare Plants, which have lately flowered in the neighbourhood of Edinburgh, 
and chiefly in the Royal Botanic Garden; by Dr. Graham, Professor of Botany, 
in the University of Edinburgh.—Celestial Phenomena, from April 1 to.Iuly 1, 
1831; calculated for the Meridian of Edinburgh, Mean Time, by Mr. George 
Innes, Astronomical Calculator, Aberdeen. 
Proceedings of the Wernerian Natural History Society. —Papers 
Read.—Jan. 22nd, 1831. By Mr. John James Audobon, an account of the 
White-Headed Eagle of America, (^Aqiiila leucocephala) and exhibited an en¬ 
graving of the bird.—By the Rev.D. Scott, an Essay on the Selavim or Quails 
of the Bible.—And by the. Secretary, a Letter giving a description of the Soil 
&c., at the Settlement of Swan-River, by a Settler, which is not very inviting 
to Emigrants. Feb. 5th, by the Secretary, an account by the Rev. Lansdow’n 
Guildford, of a new species of Indian Moth, (called Attiens JVdtiomi., in honour 
of Mr. James Wilson, a distinguished Entomologist) with a coloured drawing 
of both sexes.—Professor Jameson maile a communication on Flints found in 
Bamffshire, by Mr. J. Christie; and then read an Essay on the form of Noah’s 
