PLATE 1 
EXPLANATION OF FIGURES 
Figures 1 to 4 are from specimens in which complete amputation of the limb 
was made at the knee-joint. 
1 Longitudinal section of a limb 30 days after operation. Ep.f., femoral 
epiphysis; Az.C., axial cartilage; Per.C., peripheral cartilage; C.c.,calcified 
cartilage of the shaft; B.f., bone of the shaft (femur); M.c., marrow cavity. The 
narrow space distal to the epiphysis is an artifact. Magnified about 30 diameters. 
2 Longitudinal section of a limb 40 days after operation. Hm.C., embryonal 
cartilage. Other abbreviations as in figure 1. The space between the femoral 
epiphysis, Hp.f., and the embryonal cartilage Em.C., is probably an artifact. 
Magnified about 30 diameters. 
3 Longitudinal section of a limb 38 days after operation. Abbreviations as 
in figures 1 and 2. Magnified about 30 diameters. 
4 Longitudinal section of a limb 48 days after operation. T7’.c.n., new tarsal 
cartilage; Fib.n., new fibula; J.c.n., new joint-cavity; Ep.f.n., new femoral epi- 
physis; Os.n., bone formation in new cartilage; M.c.n., extension of the marrow 
cavity into the new cap of cartilage (see foot-note on p. 115); B.f., bone of the 
femur. Magnified about 30 diameters. 
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