 | Charles Darwin - 1883 - 494 páginas
...in England, the heartsease and led clover would become very rare, or wholly disappear. The numVer af humble-bees in any district depends in a great measure...field-mice, which destroy their combs and nests; and OoL Newman, who has long attended to the habits of humble-bees, believes that " more than two-thirds... | |
 | John Michels (Journalist) - 1883 - 874 páginas
...Complex relations of all animals and plañís to each other in the struggle for existence," he says, "The number of humblebees in any district depends...measure on the number of field-mice, which destroy iheir combs and nests; and Col. Newman, who has long attended to the habits of bumblebees, believes... | |
 | Charles Darwin - 1884 - 396 páginas
...if the whole genus of humble-bees became extinct or very rare in England, the heart's-ease and red clover would become very rare, or wholly disappear....field-mice, which destroy their combs and nests ; and Colonel Newman, who has long attended to the habits of humble-bees, believes that " more than two thirds... | |
 | Henry Christopher McCook - 1884 - 490 páginas
...England, the heart's-ease and red clover (which they fertilize by carrying pollen from flower to flower), would become very rare or wholly disappear. The number...of humble-bees in any district depends in a great degree on the number of field mice which destroy their combs and nests ; and Colonel Newman, who has... | |
 | Joseph Thomas Cunningham - 1886 - 48 páginas
...clover, Trifolium protense, can only be fertilized by humble bees. The number of humble bees depends in great measure on the number of fieldmice, which destroy their combs and nests, and the number of field-mice is largely dependent on the number of cats. Carl Vogt has pursued this chain... | |
 | William Baker - 1892 - 156 páginas
...that if the whole genus of humble-bees became extinct or very rare in England the heartsease and red clover would become very rare or wholly disappear....field-mice, which destroy their combs and nests ; and Colonel Newman, who has long attended r to the habits of humble-bees, believes that ' more than two-thirds... | |
 | Sir Patrick Geddes - 1893 - 226 páginas
...that, if the whole genus of humble-bees became extinct or very rare in England, the heartsease and red clover would become very rare, or wholly disappear....field-mice, which destroy their combs and nests ; and Colonel Newman, who has long attended to the habits of humble-bees, believes that more than two-thirds... | |
 | Sir Patrick Geddes - 1893 - 232 páginas
...depends in a great measure on the number of field-mice, which destroy their combs and nests ; and Colonel Newman, who has long attended to the habits of humble-bees,...two-thirds of them are thus destroyed all over England." l Now the number of mice is largely dependent, as every one knows, on the number of cats ; and Colonel... | |
 | Charles Darwin - 1896 - 406 páginas
...that, if the whole genus of humble-bees became extinct or very rare in England, the heartsease and red clover would become very rare, or wholly disappear....humble-bees in any district depends in a great measure upon the number of fieldmice, which destroy their combs and nests ; and CoL Newman, who has long attended... | |
 | Charles Darwin - 1896 - 408 páginas
...that, if the whole genus of humble-bees became extinct or very rare in England, the heartsease and red clover would become very rare, or wholly disappear....humble-bees in any district depends in a great measure upon the number of fieldmice, which destroy their combs and nests ; and CoL Newman, who has long attended... | |
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Now the number of. mice is largely dependent, as every one knows, on the number of cats; and Col. 
