Another common mistake, is, that the stimulus of animal food is necessary for the full developement of the physical and intellectual powers. This notion is disproved by facts. The inhabitants of Lapland and Kamtschatka, who live altogether on animal food, are among the smallest, weakest, and most timid, of races. But the Scotch Highlanders, who, in a very cold climate, live almost exclusively on milk and vegetable diet, are among the bravest, largest, and most athletic, of men. The South-Sea Islanders, who live almost exclusively on fruits and vegetables, are said to be altogether superior to English sailors, in strength and agility. An intelligent gentleman, who spent many months in Siberia, testifies, that no exiles endure the climate better than those, who have all their lives been accustomed to a vegetable diet. The stoutest and largest tribes in Africa, live solely on vegetable diet, and the bright, intelligent, and active Arabs, live entirely on milk and vegetables. The popular notion is, that animal food is more nourishing than vegetable; but on this point, scientific men hold different opinions. Experiments, repeatedly made by some chemists, seem to prove the contrary. Tables have been prepared, showing the amount of nutriment in each kind of food, by which it would appear, that, while beef contains thirty-five per cent. of nutritious matter, wheat-bread and rice contain from eighty to ninety-five per cent. The supposed mistake is attributed to the fact, that, on account of the stimulating nature of animal food, it digests easier and more quickly than vegetables. Many physicians, however, among them, Dr. Combe,[O] are of opinion, that animal food "contains a greater quantity of nutriment in a given bulk, than either herbaceous or farinaceous food." In some diseases, too, meat is better for the stomach than vegetables. The largest proportion of those, who have been remarkable for having lived to the greatest age, were persons, whose diet was almost exclusively vegetables; and it is a well-known fact, that the pulse of a hardy and robust man, who lives on simple vegetable diet, is from ten to twenty beats less in a minute, than that of men who live on a mixed diet. In regard to the intellect, Dr. Franklin asserted, from experience, that an exclusively vegetable diet "promotes clearness of ideas and quickness of perception; and is to be preferred, by all who labor with the mind." The mightiest efforts of Sir Isaac Newton, were performed, while nourished only by bread and water. Many other men, distinguished by intellectual vigor, give similar testimony. These facts show that animal food is not needful, to secure the perfect developement of mind or body.[P]