Abstract

References
1.
Bernard
Claude
, Compt. Rend. d. Sci. , xxxi , 533 ; xliii, 825.
2.
Kolliker
, Virchow's Archiv , x , 3
3.
Boehm
, Archiv der Pharmacie , 1896–7 , Band 234 , 660 .
4.
Lewin
L.
, Chem. Zeit. , 1923 , xlvii , 65 .
5.
Spath
E.
Leithe
W.
Ladeck
F.
, Berichte der Deut. Chem. Ges.
6.
Hunter
H.
, “Brit. Guiana at the Paris Exhibition” (Lond., 1878 ), Preface, p. 80 .
7.
Lucas
Keith
, Journ. Phys. , 1906 , xxxiv , 372 .
8.
Bremer
F.
, Titeca, and Van der Meiren , Compt. Rend. Soc. de Biol. , 1927 , xcvi , 704 .
9.Iid ., ibid. , xcvii , 895 .
10.
Bremer
Titeca
, ibid. , 1928 , xcix , 624 .
11.Iid ., ibid. , 1931 , cvii , 253 .
12.
Bremer
, Arch. of Surg. , 1929 , xviii , 1463 .
13.
Hartridge
H.
West
Ranyard
, Brain , 1931 , liv , 312 .
14.
Raleigh
Walter
Sir
, Hakluyt's Voyages III , 649 , “Discovery of the large, rich and beautiful Empire of Guiana.”
15.
Humboldt
, Personal Narrative (1821 ), vol. 5 , ii , p. 550 .
16.
Waterton
, “Wanderings in South America” .
17.
Schomburgk
R. H.
, Annals of Nat. History (Jardine, etc.), (Lond., 1841 ), vii , 407 .
18.
Schomburgk
R.
, “Travels in Guiana” , 1840–44 , vol. i , p. 350 .
19.
Quelch
J.
, “Timehri” (Georgetown, 1895 ), p. 259 .
20.
Ing
, Proc. Roy. Soc., B. , 1930 .
21.
Cooper
S.
West
Ranyard
. (Unpublished.)
22.
Mathews
, Journ. of Phys. , 1931 , lxxii , 166 .
23.
Hartridge
H.
West
Ranyard
, Brain , 1931 , liv , 508 .
24.
Dale
H. H.
Gaddum
J. H.
, Journ. of Phys. , 1930 , lxx , 109 .
