scientific methods

The Philosophy of Spiritual Activity
A Modern Philosophy of Life Developed by Scientific Methods

Rudolf Steiner

Psychic Phenomena
A Brief Account of the Physical Manifestations Observed in Psychical Research

Edward T. Bennett

On Laboratory Arts

Richard Threlfall

Occult Chemistry: Clairvoyant Observations on the Chemical Elements

Annie Besant

Preliminary Report of the Commission Appointed by the University of Pennsylvania to Investigate Modern Spiritualism
In Accordance with the Request of the Late Henry Seybert

University of Pennsylvania. Seybert Commission for Investigating Modern Spiritualism

Introduction à l'étude de la médecine expérimentale

Claude Bernard

The Principles of Scientific Management

Frederick Winslow Taylor