juncture ahead. That he was living in New York City at the time of the experiments during 1937-38 is established in the book itself. SIR GEORGE HUBERT WILKINS (1888-1958) was the noted British explorer born in Australia. He made a number of trips to Antarctica and to the Arctic regions. Valuable experience was gained when he accompanied Vihjalmur Stefanson’s expedition (1913-18) to the Arctic regions, and Sir Ernest Shackleton’s expedition (1921-22) to Antarctica prepared Wilkins to assume the leadership in the following years of a number of polar expeditions. A pioneer in the method of air exploration, he was the first to fly (1928) from North America to the European polar regions, traveling from Point Barrow, Alaska, to Spitsbergen. His book, FLYING THE ARCTIC (1928), described his observations during the flights. He was knighted that year. He commanded an Antarctic expedition (1928-29) during which flights were made in the region of Palmer Peninsula, and in 1931 he headed a submarine expedition to the Arctic regions, an exploit depicted in his book, UNDER THE NORTH POLE (1931). Though mechanical difficulties made it impossible for his submarine, the NAUTILUS, to reach the North Pole, Wilkins work was to be very valuable for future Arctic exploration by submarine. From 1933 to 1939, he was manager for Lincoln Ellsworth’s trans-antarctic expeditions. His THOUGHTS THROUGH SPACE (with H. M. Sherman, 1942) recounts the attempts made by Wilkins and Sherman to communicate by mental telepathy, during the period when Wilkins was searching (1938) for a group of Russian aviators lost in the Arctic. During World War II and afterwards, Wilkins served as a geographer for the British army.