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A capillary-type viscometer for the study of solutions containing volatile solvents has been designed and tested. Because the solution need not be transferred from the container in which it is prepared, measurements made with this viscometer on concentrated solutions of large molecules, such as those of nitrocelluloses, in volatile solvents are more reproducible than those made with an Ostwald-type capillary viscometer. Because of the small volume of the new viscometer, vis-

Clemmensen reduction of the hydroxytetralone (XIII, 0.20 g.) led to a quantitative yield of the tetralol (VII, R = H) as brown crystals, m.p. 71-75°. Recrystallization from dilute methanol afforded colorless needles, m.p. 78°( mixed m.p ).When the relatively impure specimen of the methoxy acid (X) was used in the above reaction, a different result was obtained. X (0.70 g.), m.p. 114-115°, was treated with 48% hydrobromic acid (7 cc.) in glacial acetic acid (3.5 cc.), as described above. Along with the tetralone (XIII, 0.11 g., 20%), an acid (XIV, 0.13 g., 19%) was obtained as brown needles, m.p. 110-113°. Reaystallization from wrater gave colorless elongated needles, m.p. 116-117°.