Abstract

References
1.
Priestly
WO
Storer
HR
. The obstetric memoirs and contributions of James Y Simpson, MD FRSE , vol 1 . Edinburgh : Adam & Charles Black , 1855 : 498 –505
2.
Arnott
N.
Pneumatics . In: Elements of physics or natural philosophy , 1829, Chapter III. 1829 : 285 –327
3.
Simpson
JY
. The air tractor . Monthly J Med Sci 1849 ; March:618
4.
Duns
J.
A memoir of Sir James Y Simpson . Edinburgh : Edmonston & Douglas , 1873 : 288 –9
5.
James
FH
. The application of atmospheric pressure to aid delivery . Lond Med Gaz 1849 ; 8 : 478 –80
6.
Mitchell
J.
Who invented the air-tractor? Lond Med Gaz 1849 ; 8 : 519 –20
7.
Simpson
JY
. Who invented the air tractor? Lond Med Gaz 1849 ; 8 : 520
8.
Mitchell
J.
Who invented the air tractor? Lond Med Gaz 1849 ; 8 : 520 –1
9.
Duncan
JM
. The controversy respecting the invention of the air-tractor. The claims of Professor Simpson and Dr Mitchell . Lond Med Gaz 1849 ; 8 : 609
10.
Editor. The controversy respecting the invention of the air-tractor. The claims of Professor Simpson and Dr Mitchell. Lond Med Gaz 1849 ; 8 : 609 –10
11.
Simpson
JY
. On the discovery and construction of the air tractor . Lond Med Gaz 1849 ; 8 : 656 –7
12.
Johnson
T
(Transl) . The workes of that famous chirugion, Ambrose Parey . London 1665 : 129
13.
Yonge
J.
An account of balls of hair taken from the uterus and ovaria of several women . Phil Trans R Soc 1706 ; 25/26 : 2387 –92
14.
Simpson
JY
. On the mode of application of the long forceps . Lond Edin J Med Sci 1849 ; 9 : 193 –6
