logia Sinica. Even if the costs entailed by the participation of the Chinese members and their salaries constituted a very perceptible economic burden, one must bear in mind the fact that the Chinese contingent was of great practical use to us and also that it was a source of much personal satisfaction to me to give a number of young Chinese a chance of modern scientific training under European leadership.
COMPARISON WITH THE ANDREWS EXPEDITION
RoY CHAPMAN ANDREWS'S great American expedition lasted, though with some interruptions, for a period of ten years and cost $600,000, or almost exactly the same as my expedition amounted to. But while mine went on uninterruptedly for eight years ANDREWS'S expedition was in the field only during the warm half of the year, or from April ist until October ist. During the winter months his experts were busy preparing their palaeontological and other collections. For this purpose they had set up laboratories in their head-quarters in Peking.
Time and again ANDREWS himself used the winter months for a journey to America to look after the affairs of the expedition and to raise funds for its continuation. It always falls to the lot of the responsible leader to see to the financing of these large enterprises. While the field work in my expedition went on without interruption winter and summer I was myself also obliged to journey home on three occasions and to visit America twice, partly to see to innumerable practical matters and partly to raise funds.
ROY CHAPMAN ANDREWS was leader of his expedition during the whole period, from 1921 till 1930. His second in command, WAITER GRANGER, was also in harness from 1921 till 193o. The other American participants carried out their field work or their technical jobs during shorter periods. J. MCKENZIE YOUNG, in charge of the motor-transport, served from 1923 till 193o, CLIFFORD H. POPE, the herpetologist, from 1921 till 1926, the three geologists CHARLES P. BERKEY, FREDERICK MORRIS and GEORGE OLSEN served for three years, while most of the other members were only in the field for a single season. In my expedition NORIN was with us for about eight years, BERGMAN for nearly seven and a half, SÖDERBOM for about seven years, CHEN between five and six years, HUMMEL, BEXELL, AMBOLT, HALIDE and YUAN about five years, BOHLIN and HÖRNER over four years, MoNTELL over three and a half years, HASLUND three and LARSON two years. Of these, BEXELL was working in the field uninterruptedly during four whole years.
The difference between ANDREWS'S working methods and my own is explained chiefly by the fact that he was in the field for half the year while I was in the field all the year round. He was a firm believer in correlated work, and all the different members of his expedition collaborated, whereas the different scientists in my expedition worked independently. The difference in our respective methods of work
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