Abstract

References
1.Laurens , Physiological Reviews , 1928 , viii , No. 1 .
2.Humphris , Artificial Sunlight and its Therapeutic Uses.
3.
Rollier
A.
, Heliotherapy.
4.
Hill
L.
, Sunshine and Open Air.
5.
Hill
C.
Clarke
J.
, Amer. Journ. Hyg. , 1927 , iv , 448 .
6.Stallybrass , Proc. Roy. Soc. Med. (Sect. Epid.) , xxi .
7.Vernon , Physiological Reviews , viii , No. 1 .
8.
Rogers
L.
, Brit. Med. Journ. , 1928 (i ), 300 .
9.Pearce and van Allen , Journ. Exper. Med. , xliv.
10.
Lloyd
Arnold
, Journ. Hyg. , 1929 ,” xxix , No. 1 .
11.Newsholme , Brit. Med. Journ. , 1895 (i ), 527 , 581 .
