Department of Commerce and Labor.

9. Bureau of Standards.

2. Scientific.

3. Heat and thermometry.

1. Thermometry.

2. Pyrometry.

3. Calorimetry.

Reference

page.

Department of Commerce and Labor.

9. Bureau of Standards.

2. Scientific.

4. Lights and optical instruments.

1. Spectrometry..
2. Polarimetry.
3. Radiometry.

4. Interferometry..

Refer

ence

page.

Department of Commerce and Labor.

9. Bureau of Standards.

2. Scientific.

5. Chemistry.

1. Chemical investigations...

2. Standard reagents and material.

3. Chemical analysis in connection with material testing..

Refer

ence

page.

Department of Commerce and Labor.

9. Bureau of Standards. 2. Scientific.

6. Engineering instruments.

1. Engineering instruments (not included in other sections)..
2. Mechanical appliances (not included in other sections)....

Refer

ence

page.