Berkefeld Filter which has internal cylinders made of pure water in hold size yields 1 gallon of p 4 minutes. Easy to clean. Perfectly satisfactory in every way. Kodaks do away with cumber some plate-holders heavy fragile glass plates and bothersome dark slides. O Just turn a Ke) J styles use either plates or films. Kodaks $5.00 to $35.00. EASTMAN KODAK CO., scientific american, 1900-02-03
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