 Insects and birds have been carefully classified according to their several species; their habits of feeding have been closely observed, and the results ascertained and computed. It has been concluded that by no agency save that of little birds can the...  Report - Halaman 308oleh New Hampshire. Department of Agriculture - 1873Tampilan utuh - Tentang buku ini
 | 1862 - 448 halaman
...closely observed, and the results ascertained and computed. It has been concluded that by no agency save that of little birds can the ravages of insects be kept down. There are some birds which live exclusively upon insects and grubs, and the quantity which they destroy... | |
 | 1862 - 446 halaman
...closely observed, and the results ascertained and computed. It has been concluded that by no agency save that of little birds can the ravages of insects be kept down. There are some birds which live exclusively upon insects and grubs, and the quantity which they destroy... | |
 | United States. Congress. Senate - 1862 - 1092 halaman
...closely observed, and the results ascertained and computed. It has been concluded that by no agency save that of little birds can the ravages of insects be kept down. There are some birds which live exclusively upon insects and grubs, and the quantity which they destroy... | |
 | 1862 - 476 halaman
...closely observed, and the results ascertained and computed. It has been concluded that by no agency save that of little birds can the ravages of insects be kept down. There are some birds which live exclusively upon insects and grubs, and the quantity which they destroy... | |
 | Edmund Morris - 1865 - 276 halaman
...closely observed, and the results ascertained and computed. It has been concluded that by no agency, save that of little birds, can the ravages of insects be kept down. There are some birds which live exclusively upon insects and grubs, and the quantity which they destroy... | |
 | Edmund Morris - 1864 - 266 halaman
...closely observed, and the results ascertained and computed. It has been concluded that by no agency, save that of little birds, can the ravages of insects be kept down. There are some birds which live exclusively upon insects and grubs, and the quantity which they destroy... | |
 | 1865 - 458 halaman
...closely observed, and the results ascertained and computed. It has been concluded that by no agency save that of little birds can the ravages of insects be kept down. There are some birds which live exclusively upon insects and grubs, and the quantity which they destroy... | |
 | New Hampshire. Department of Agriculture - 1873 - 712 halaman
...minutely experimented for several years, comes to the conclusion from his researches : " Birds are in general far more useful than hurtful to the agriculturist,...earth will speedily become a wilderness, a waste, a deseit. PROPEH RALANCE NECESSARY. would destroy the products of his fields and his flocks. He cannot... | |
 | Edmund Morris - 1905 - 284 halaman
...closely observed, and the results ascertained and computed. It has been concluded that by no agency, save that of little birds, can the ravages of insects be kept down. There are some birds which live exclusively upon insects and grubs, and the quantity which they destroy... | |
 | 1861 - 806 halaman
...interesting abstract of the Report presented by these gentlemen i—" It has been concluded that by no agency save that of little birds can the ravages of insects be kept down. There are some birds which live exclusively upon Insects and grubs, and the quantity which they destroy... | |
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