EXPOSURE 
a 
Tropics, 20° N. to 20° S.; Northern Brazil, Canal Zone, 
Central Africa, Ceylon, Borneo, Sumatra and Pacific Islands. 
JEN, SOU ag May Apr. 
MM Mame yy puly vase 
12 0 0 —y, 
ga 0 0 0 
Ou 2 0 Orewa ko 
oS 1 yy, yy, 
8. 4 Aaa is 1 
Fs) $ 3 2% 
Mar. 
Sept. 
—, 
0 
22 
Feb. Jan. 
Ochi Nov.) Dee: 
4 0 8) 
0 0) 0) 
0 0 0 
Vay) iva viel 
1 1 ly 
PAAR 3 
PLATE SPEEDS.—The numbers in the first column indicate 
the exposure factors for use with the American Photography 
Exposure Tables. The letters in the last column are develop- 
The other columns 
contain factors for use with the Burroughs-Wellcome, Wat- 
kins, Wynne and Harvey exposure meters. 
ment speeds for Thermo Development. 
Amer 
Phot 
AS) 1050610 ERO OEE ae Bu anal 
Agta (Color plates .)5 ci. eo esis 0 ee 
Amsco Specdex: filmy .). ler. is cs ees te %4 
AC Pe ME Wltra Speed | 2)... 50s ei ss 5 « a3 
AP EA VIS YING (SICLETIEN TS 18 ors 6) cele stele % 
APSE WMENSpPeCtal TAaApId |). clsiei cies ose 1 
PACHA VIC TITINY  eilehe laters Caer NU eh dito . iL 
A. Edwards Ensign ............ 1 
A. Edwards Ensign speedy ...... % 
Barnet Ordinary) 2). selec as see es 6 4 
Barnet) Special rapid) 6.0.2 d. . ss 1% 
Barnet self-screen ..........00. al 
EMOTE GU SEAT) oe el aiavelevcle! aia chases %4 
BAENeL) StUAIO SOO. es ui es eels wie 4 
Barnet Studio 500 & Press ...... Wy 
Barnet Ult. rap. & SS ortho ...... Yy 
Barnet Studio 400 ortho ........ 34 
APMC DE TESS esta HM pay ucie ave gia) % 
TBRON TCG a 3; Nd Bayyeg Ba hs aD Te ene Da es % 
TENDEPIOHYStH NBS spy Oa BA Ue 4 
TEAS DICH OGY nnd Be a _IMA 1% 
PAM CHE teres ALL VARY Se Ment mB Tel ie 3 
Carbine yrolly filmy ayes els 1 
Central Colornon ..........2.«6 4 
Central Pan. Ortho. Com ........ 4 
GentralKComebwas coisa eka ots seve 
Central SHECiAw A cen Nee 1 
Central Special XX ios atid Mae,  % 
Wat. Wynne Har. 
130 
73 
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