Peruvian Expedition 1914-15. 
Official Circular, #6. 
Members of the expedition are requested to become pro- 
ficient in using the kodak tank developer. There are on 
hand in the quartermaster's depertment two or three old 
_ tank developers which can be used to experiment with. As 
it is necessary to develop pictures in the field in order 
to prevent the negatives from spoiling, and as unskillful 
developing is a very fruitful source of bad results in 
photography, it is very important this subject be thor- 
oughly understood, and all necessary experiments made be- 
fore leaving for the field. As one of the principgl re- 
sults of expedition is collection of photographs,it is ex- 
tremely important all members get familiar with the pro- 
céss of taking & developing pictures as soon as possible. 
Quartermaster will on request issue necessary directions 
and instructions for taking and developing pictures. 
Instructions for numbering photographs. 
When films are issued by the quartermaster, serial nun- 
bers will be assigned to accompany the films. As soon as 
films are developed, all films, both good and bad, are to 
be numbered in ink as follows: in the lower right hand 
corner of the glossy side of the print on the negative, so 
that it will show when printed, a serial number, lettering 
to be about 1/4 inch in height and as clear and distinct 
| 88 possible, preferably made with a fine pen; on the mar- 
gin of the film so that it does not show on the negative 
when printed are to be put the month and day, together with 
the initials of the person taking the picture. 
Example: Suppose that the quartermaster has issued ® yu 
| LO rolls of 10 exposures each, & given you the serial num 
bers for these 100 exposures, 2401 to 2500. Suppose the 1d 
roll was exposed on Aug. 20. In marking, the 1st picture 
taken should receive in the lower right hand corner the 
serial number 2401, & on the mrgfin in the lower left 
‘hond corner 8 - 20-14 ~~ X.¥.%, (i.e. your initials. ) 


PERUVIAN EXPEDITION 1914-15, 
Official Circular #20, Revised . 
Assignment of Photographic Negatives and 
Numbers. 
The mumber of films assigned to sach member 
of thé Expedition will devend on such ¢ircim 
stances|as the kind of work they are doing, 
their skill in getting good pictures, the number 
of photographs taken by other members of the 
Expedition in any siven region, 
For convenience the following numbers are 
assigned, although this does not mean that mem 
bers will necessarily use as. many negatives as 
they are assigned numbers, nor, on the other 
hand, that they will necessarily be limited to 
this number of pictures, 
The following numbers are reserved for the 
use of members as follows: 
Chief Engineer Edis: 6, 000—6,209 
Engineer Hasbrouck: 6,201+6,400 
Naturalist Heller: 6,401—6, 800 
Agsst.Topographer Maynard: 6, 801-7, 000 
Topographer Anderson: 7, 505=7,,999 
Chief Assistant. Hardy: 8, 060—8 200 
Surgeon. Ford: 8, 201-8499 
Vacant numbers for later 
assignment: 8, 580=9,,004 
the botanists, using their own photographic 
apparatus, Will use their ow notation. 
Use of films 
It is expected that each member of the Expe- 
dition will use the films entrusted to him for 
the purpose of illustrating the general 

