#8. Captain Cook.#--But in the year 1770 a series of important discoveries was indirectly brought about. The Royal Society of London, calculating that the planet Venus would cross the disc of the sun in 1769, persuaded the English Government to send out an expedition to the Pacific Ocean for the purpose of making observations which would enable astronomers to calculate the distance of the earth from the sun. A small vessel, the _Endeavour_, was chosen; astronomers with their instruments embarked, and the whole placed under the charge of James Cook, a sailor whose admirable character fully merited this distinction. At thirteen he had been a shopkeeper's assistant, but, preferring the sea, he had become an apprentice in a coal vessel. After many years of rude life in this trade, during which he contrived to carry on his education in mathematics and navigation, he entered the Royal Navy, and by diligence and honesty rose to the rank of master. He had completed so many excellent surveys in North America, and, besides, had made himself so well acquainted with astronomy, that the Government had no hesitation in making their choice. That it was a wise one, the care and success of Cook fully showed. He carried the expedition safely to Tahiti, built fortifications, and erected instruments for the observations, which were admirably made. Having finished this part of his task, he thought it would be a pity, with so fine a ship and crew, not to make some discoveries in these little-known seas. He sailed south for a time without meeting land; then, turning west, he reached those islands of New Zealand which had been first seen by Tasman. But Cook made a far more complete exploration than had been possible to Tasman. For six months he examined their shores, sailing completely round both islands and making excellent maps of them.