Worlds greatest foresters. Forest Academy of Korkeakoski 1939 Kalle Putisko is a typical Finnish student of forestry. He is 20 years of age, has been studying at the university of Helskink for a year and a half. Together with 59 other students he has been privileged to spend 3 months at Korkeakoski where only the cream of forestry students are admitted. His preliminary examinations have proved him as a young man of outstanding ability. As he goes on his job in the forest, he studies his forest map which he carries with him attached to his belt. The compass on his right wrist helps him find his way. With the saw over his left shoulder, the axe in his left hand, and the Puka, a handy pocket-knife which most Finns carry with them hanging loosely from his belt, he is fully equipped for his task. From a series These Men Built the Mannerheim Line - the Finnish zone of frontier fortifications was designed and constructed entirely by the Finnish people. Finnish engineers began work on the line in 1937 but it was not until this summer in 1939 that the work was speeded up and completed. Then, conscious of the dangers of a weak frontier, Finnish young men and students gave up their summer holidays in order to help voluntarily in the building of tank traps and fortifications.