Form. No. 101
Sompania Ubmlinishzc~abow bd §uano
tStSeiccio'saeS4ezca.i*                                    a    no(9b.. 323/oy 325/9
Xiina19"',21-47
11 June 1941
Dear Aldo:
I enclose a cycle chart that, I think, will interest you. It's    -
only- tentative, so far, but the picture will not change materially.  e
too ten quadrats of 100 sq. mpters each, carefully wfighed their guano,
and counted nests.  The result showed 15.8 kilos of guano, per yeur,
for each, breeding bird. I'm going to have the work repeated, because
our mean densities were 30)j. , whereas 50 quadrats scattered up and down
the coast, showed 3205.   hen, dividing into the anount dg