20 W. M. HAMLET. 



first volume. His " Forest Flora of New South Wales " has 

 now reached the thirty-fourth part, with 130 original litho- 

 graphic plates and a very large number of photographic 

 illustrations, while a second part of " Illustrations of New 

 South Wales Plants not previously depicted " has also 

 appeared. 



In regard to oxygen, the advantage of an unlimited 

 supply of fresh air with its full complement of oxgen, is 

 more than ever emphasised by the discovery of the use of 

 oxygen as the most powerful lung purifier we know. Dr. 

 Leonard Hill speaks of it as a new factor in physical effici- 

 ency, and in a number of experiments on athletes at the 

 'Varsity and Olympic games, cricketers, footballers, and 

 on racehorses, he finds that the waste products from 

 muscular exertion are so rapidly oxidised that the sensation 

 of fatigue is abolished, and the body is capable of a far 

 greater output of energy, and this without any detriment 

 to the body. The fact that breathing oxygen does no harm 

 is shown by the condition of the men who wear the Fleuss- 

 Siebe-Gorman rescue apparatus for use in poisonous atmo- 

 spheres, as in mines after explosions. The men breathe 

 oxygen for two hours at a time, and do the hardest work 

 when being trained in the use of this apparatus. Some of 

 these men have worn the apparatus frequently for the last 

 two or three years, and are in perfect health. He says, I 

 have for the last six months taken oxygen frequently before 

 and after running and bicycling, and am now much fitter 

 than I was before these tests, and all this simply explains 

 why the sedentary resident in towns, longs for the moun- 

 tains, the country or the seaside, and goes to places where 

 not only the full quantity of oxygen is to be obtained, but 

 where it is fresh and not devitalised. l 



1 Influence of Oxygen on Athletes, Leonard E. Hill and Martin Flack, 

 Journal of Physiology, 38. 



