NO. I GROWTH LAYERS IN TREE BRANCHES — CLOCK ET AL. 23/ 



TTC 36-6-a {1937-1942) 

 7 see 4- I psce + i sL + 2 psL + 2 dL -f- i d arc -|- 2 ddw — 6 years. 



TTC 36-7-a {1938-1942) 



4 see + I msee + 2 psce + 2 sL + i psL + i d ^L + i ddw — 5 years. 



The increment for 1938 consists of i msce and i psce. 



TTJ 2-4-a (1937-1942) 

 7 see + 2 dee + 2 dL + i s are — 6 years. 



TTJ 2-5-a (1938- 1942) 

 6 see + I dL — 5 years. 



The increment for 1940 has 2 see which becomes less sharp outward 

 on the branch. In sections a at 48.5 cm. from the tip, the densewood 

 of the inner growth layer of 1940 is much heavier than the densewood 

 of the outer growth layer; at 36 cm., the inner densewood is less 

 sharp; and at 25 cm., it has nearly disappeared, 



TTP 20-i-a {1935-1939) 



5 see + I msce + i dee +1 sL + 2 psL + i d are — 5 years. 



In TTP 20- 1 -a the partly sharp lenses appear to be completely sharp 

 under very low powers. 



TTP 20-2-a {1937-1939) 

 4 see + I dee + 3 dL — 3 years. 



The increment for 1937 possesses 2 see + 2 dL. 



TTP 20-4-a (1936-1939) 

 4 msee + i psee + 2 sL 4- 2 msL -f- i dL + i pcL — 5 tfs — 4 years. 



The increments for 1936, 1937, and 1938 are terminated by growth 

 layers not completely sharp. 



TTP 20-ii-a (1940-1941) 

 2 see + I msee + i dee — 2 tfs — 2 years. 



TTP 20-13-a (1940-1941) 



2 see -}- I psce + i dee — 2 tfs — 2 years. 



TTP 20-i6-a {19 42-1944) 



3 see + I dee + 2 sL + i dL — 4 tfs — 3 years. 



