Editorials:

Editorial Comment Inside front cover
J.R. Maclean, MD
Articles:

Safety, Side Effects and Relative Lack of Toxicity of Nicotinic Acid and Nicotinamide
A. Hoffer, MD, PhD

The Poggendorff Illusion in Schizophrenic Patients
A.W. Pressey, PhD; C.A. Bayer; H. Kelm, PhD

How to Judge a Mental Hospital
H. Osmond, MD

Studies of the Transcephalic D.C. Circuit:Effects of Plasma Cations and the Blood-Brain Barrier
M.A. Cowen MD; J. Ross, PhD

An Electrical Telemetric Method Used to Measure Anxiety in Human Subjects (part 1)
H. Kelm, PhD; D.G. Fischer, PhD; A.E. Krause, MSc; A. Hoffer, MD, PhD

A Source of Signals for an Electrical Telemetric Method Used to Measure Anxiety in Human Subjects (Part 2)
H. Kelm, PhD; D.G. Fischer, PhD; A.E. Krause, MSc; A. Hoffer, MD, PhD

The Conjunction Model of Schizophrenia: Awareness in Normally Silent Brain Areas
H. Wiener, MD