Recently published Ornithological Works. 399 
41. Marek on the Influence of Wind and Weather on 
Migration. 
(Einfluss von Wind und Wetter auf den Vogelzug. Von Prof. M. 
Marek, Vincovei. Separat-Abdruck aus Ornithol. Jahrb. xvii. 1906, 
Heft. 3-6.] 
Professor Marek, in the course of an elaborate paper, 
discusses the influence of wind and weather on the flight 
and migration of birds, with the effect of the barometrical 
maxima and minima upon it. He has spared no pains to 
examine every detail of the subject, which should be care- 
fully studied by those interested therein, as it is impossible 
to give a proper idea of so wide a subject in our limited 
space. We may, however, say that the author considers 
that the effect produced is most marked and constant. 
42. North on Nests and Eggs of Australian Birds. 
[Nests and Eggs of Birds found breeding in Australia and Tasmania. 
By Alfred J. North, C.M.ZS., Ornithologist, Australian Museum, Vol. ii. 
Part 1. Sydney, 1906 *.] 
The second volume of Mr. North’s work on the nests and 
eggs of the birds of Australia and Tasmania commences with 
the Laniid, of which two subfamilies—the Gymnorhinine 
and Pachycephalinze—are well represented in the Australian 
Subregion. This Part contains also the families Certhiide 
and Sittidze, and a considerable portion of the great and cha- 
racteristic Australian family Meliphagide. Ample details 
are furnished of the nesting and eggs of the species of these 
groups, so far as they are known, and excellent text-figures 
of many of the birds and nests are given in the letterpress. 
Besides these, three large-sized plates of nests and two of 
eggs accompany the Part. The figures of the eggs, which 
are of the natural size, have been reproduced by the heliotype 
process at the Government Printing Office from photographs. 
‘The execution throughout does great credit to the care and 
skill of our fellow-workers in Australia. 
We regret to see that the recently proposed change of the 
* See ‘Ibis, 1905, p. 127. 
