4 Papers from the Marine Biological Laboratory at Tortugas. 



insight for research, his broad culture, and well-rounded special training, 

 was destined to become one of England's great men of science — a position 

 which his rare personal charm would not only have graced, but would have 

 rendered him powerful for advancing the intellectual welfare of his country. 



In 1910 he carried out some interesting observations upon the repro- 

 duction and early development of the kelp {Laminaria) of the coast of 

 Devonshire, proving that there is an alternation of generations in the life 

 cycle of this seaweed ; for the free-swimming sexual cells fuse in pairs and 

 then settle down upon the bottom and develop into a chain of cells, any 

 single cells of which may develop into a Laminaria plant. 



His published works cover a period of only four years, yet in this brief 

 time he was the author or joint author of fifteen papers. 



His earliest paper, in 1909, is upon parasitic and other diseases of fish, 

 in which he describes various forms of tumors and cancers. 



This paper was followed by one of an experimental nature written in 

 association with de Morgan as its joint author, and it was shown that, in 

 Pecten, injurious bodies implanted in the tissues soon become surrounded 

 by an agglutinated layer of blood-corpuscles and these are replaced by a 

 mass of fibrous tissue which encapsules the foreign body very much as such 

 bodies are incased by mesenchyme in injured vertebrates. 



In 191 1 Drew announced that, as a result of injury, cysts lined by 

 columnar ciliated epithelium could be formed from the fibroblasts in Pecten. 

 He also found that the blood corpuscles of Lamellibranchs are capable of 

 ingesting and destroying bacteria, and that if the animal be wounded so 

 that blood escapes, some of the corpuscles adhere to the cut surfaces and 

 then send out slender processes which fuse with those from other corpuscles, 

 thus forming a net-work the fibers of which finally contract and close the 

 wound. 



He also found that the repeated application of a strong solution of iodine 

 to a circumscribed area of the skin of Fundiilus produces an inflammatory 

 tumor having some relation to certain abnormal growths seen in nature in 

 fishes. 



While at Plymouth the subject of the cause and nature of tumors and 

 cancers engaged his major interest, and he did much histological work upon 

 the fate or growth of transplanted tissues. His last work was upon the 

 culture of living tissues from the frog and the dogfish in plasma outside the 

 body of the animal. In this study he achieved decided success, having 

 with his usual ingenuity devised an improved technique which enabled him 

 to grow tissues upon microscope slides free from bacterial contamination. 

 The paper describing these results was completed only a few days before 

 he died and is published in the Journal of Pathology and Bacteriology, 

 Cambridge. 



Some of his most interesting work, however, was done while associated 

 with the Department of Marine Biology of the Carnegie Institution of 

 Washington. 



