128 Reviews and Extracta. — Natnrnl History. 
" Aocordiiigly, from a kiiovvledtje of the subject, acquired, virtually, by an in- 
veslioatioii of this kind, Mr. Macleay recommended that the trees in the Parks 
siioiild be ins|)ecte(l 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, he recommended to be cut down and burnt with the larvte 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 larva;, or even removing- the trunks from the vicinity 
of the sound wood, would be, 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 mischief for the season had been eft'ected ; and when all these nurse- 
ries of ////fev/;// 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 be 
lopt off and burnt; and for those with tiie trunks infected, he recommended a 
coating of tar mixed with train oil, to be applied to them in March. 
" Tiiese rerommendations were adopted, or similar means employed, and the 
remaining- trees were happily preserved; and there can be no doubt, that, had the 
possessors of the Hartz, been, in lh<! first instance, acquainted with tlie true cause 
of the disease, those forests migiit in like manner have been saved." 
2. — EUIMUKCU PuiLOSOPIIICAL JOURNAL. By ROBERT JaMESO.V, 
Reg-iiisi Pi'ofessor of Natural History, Lecturer on Mineralogy', &c. 
Quarterly. 8vo. IsXSd. 
(con<;/ii(le(I from png': 41.) 
The Number fob Aprii., roNTAixs 
Outline of a Plan for combining Machinery with the Manual Printing-Press, 
liy John Clerk Maxwell, Esq. ofMiddlebie, (with a plate) — Account of a Pla- 
tina Lamp, by George Merry weather, Esq. of Whitby. — Observations on the 
Fossil Trees, of Van Dieman's Land, by William Nichol, Esq. Lecturer on Na- 
tural Philosophy, — Account o.f 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 Osseovis Breccia, by Dr. Lang. — Descriptions of New or 
Rare Plants, wliich 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 .July 1, 
1831; calculated for the Meridian of Edinburgh, Mean Time, by Mr. George 
Innes, Astronomical Calculator, Aberdeen. 
Proceedings of the Werneri/VN N.\TURAr- History Society. — Papers 
Read. — Jan. 22nd, 1831. By Mr. John James Audobon, an account of the 
White-Headed Eagle of America, (^Aquila leucocephaki) aiid exhibited an en- 
graving of the bird. — By the Rev. D. Scott, an Essiy 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. Lansdown 
Guildford, of a new species of Indian Moth, (called Atticus It'ihonii., in honour 
of Mr. James Wilson, a distinguished Entomologist) with a coloured drawing 
of both sexes. — Professor Jameson made a communication on Flints found in 
Bamffshire, by Mr. J. Christie; and then read an Essay on the form of Noah's 
