Cytological drawing from an unidentified publication.
Cytological drawing from an unidentified publication.
Cytological drawing from an unidentified publication.
Cytological drawing from an unidentified publication.
Cytological drawing from an unidentified publication.
Figure 4, "The Anatomy, Embryology, Comparative Anatomy and Histology of the Pineal."
Figures 5-6 from an unidentified publication.
Figure 4, "The Anatomy, Embryology, Comparative Anatomy and Histology of the Hypophysis Cerebri."
November-December.
May-June.
September-October.
November-December.
A.J. 'Bill' Derbyshire and Hallowell Davis with an early EEG machine, Harvard Medical School Department of Physiology.
Allen Davis sleeping in an experimental cubicle.
Dr. W.G. Lennox, Mrs. Boston, and Dr. F.A. Gibbs examining a brain wave graph.
Hallowell Davis examining a brain wave graph.
Graph showing brain waves during the stages of sleep.
"H. tom Ring: Der romische Schriftsteller Virgil mit einer Nagelbrille."
"Die Gelenkbrille."
Medical advertisements for rheumatic and neuralgic paste.
