Joseph Marshall Flint 57 
V.4 Wey4: 
(2) M. 
(2) 8. (2) ZL. 
(2) L. (2) UM. 
(2) M. (2) 8. 
(2) ZL. 
(2) M. 
M. 4 between L. 4 and L. 5. 
10 5% 1, 155 
(2) V. (2) D. 
(3) S-M-L. (3) L-M-L. 
(2) DS. (2) V. 
(3) S-M. (3) L-M-L. 
(2) DI. (2) D. 
(C)nVe (C2 ave 
(2) 8. (2) 8. 
(2) DI. (2) V. 
CV 
M.5 opposite L. 5. 
D5: 1D); fy. 
(2) M. (2) M. 
(2) Z. (2) L. 
(74) He (2) MS. 
(2) L. 
Weroe V.5. 
(2) M. (2) M. 
(2) ZL. (2) S. 
L. 6. 1.6: 
(2) V. (2) Dt 
(2) D. (2) V. 
(2) V. (2) I. 
(2) D. 
D. 6. DAG: 
(2) M. (2) M. 
WG: Ve 6: 
(2) LB. 
(2) M. 
In the study of the further development of the bronchial tree, I have 
made corrosions of the lung in a series of pig embryos of increasing age 
increments represented by a centimeter of growth up to and beyond the 
time of birth. From this series of corrosions it would be possible to 
tabulate the history of each bronchus until the full growth is attained. 
The results would be too detailed, however, to be of any value. More- 
over, the wide range of variation of the branches destroys the absolute 
sequence of the branches in a successive series giving the formule only 
