Bulletin of the Bureau of Standards, Vol. 2: Issued June 15, 1906 (Classic Reprint)

Explore early 20th‑century standards science in one comprehensive issue.

This 1906 Bulletin of the Bureau of Standards collects hands‑on studies in photometry, electromotive force, and electrical standards, offering historical methods and measurements from a pivotal era in precision instrumentation.

The issue surveys Talbot’s law as applied to rotating sectored disks, detailing theoretical discussions, apparatus, and experimental results. It also presents new developments in measuring electromotive force and current, including a new potentiometer approach, and reports on absolute standards of inductance and practical instruments like an efficiency meter for electric lamps. Readers will find foundational methods, experimental designs, and discussions that shaped early standards work.

• In‑depth treatment of rotating sectored disks and light measurements for photometry
• A new potentiometer method for measuring electromotive force and current
• Construction and calculation of absolute standards of inductance
• Development of devices to test and compare electrical standards and lamp efficiency
• Historical context for the Bureau of Standards’ early precision instrumentation

Ideal for readers of historical science, electrical engineering history, and anyone curious about how early standardization work was carried out and documented.