self at twenty-eight becoming sleepless. At thirty-five "the mischief had been done." "His nervous system finally gave way." A night of sound sleep became unknown to him, while distress in the head and dyspepsia kept him company the remaining days of his life. Still, it must be kept in mind that even at sixty he writes, "My vigour is pretty well shown by the fact that I found myself running up stairs two steps at a time" and "it seems remarkable, considering my frequent bouts of dyspepsia and perpetual bad nights, I should have retained so much vitality." It was only between sixty-two and sixty-nine that he could truly be called an invalid with a capacity of only a few lines of work per day.
The work of science has often been carried on by men in not the best of health, nor of especial vigor. It has also so fascinated many of its disciples as to lead to bodily unbalancing from over-application to a sedentary calling. Galileo did an enormous amount of work, but his health was sometimes indifferent and he suffered from a number of illnesses. Darwin inherited a strong constitution and up to his voyage on the Beagle was "well, and vigorous and passionately fond of outdoor sport." His chronic nervous weakness seems to have been brought on by the privations and over-exertions of the five years' journey of exploration. By careful limitation of work and removal of unnecessary distractions, he lived to a good age, and accomplished a large amount of work.
Sir Isaac Newton was in fair health most of his days, though, from excessive mental work and absent-mindedness about eating, he had a nervous breakdown at fifty-four from which he was some months in recovering.
Franklin was proud of his physical attainments. "He was as temperate as it was possible to be in that age." He was an expert swimmer and at eighty he was fond of displaying his strength. He nearly died from attacks of pleurisy, and late in life he fell a victim to the diseases of the age—gout and stone. On the whole, Franklin throughout a long life may be considered an unusually vigorous and healthy person.
Huxley, strong and vigorous, worked at a terrible pressure and wore out before his time, but there have been many other scientists of note whose health was more constant, as Faraday, Tyndall, Agassiz and Lord Kelvin.
When it comes to men of letters, it would seem that health and vigor might be less frequent. The conventional poet, like his verses, seems a part of the world immaterial, until we become intimately acquainted with him and find that he too lives on bread and butter, beefsteak and onions.
Of the dramatists, Shakespeare, for aught we know, was reasonably healthy and vigorous. Molière led a busy, combative existence. Play
