Unidentified

3

Cashman, R.J.

1

Cashman, W. S. Huxford and R. J.

1

Huxford, W.S.

1

Lüttig, C.

1

glass

6

brass

3

metal

2

potassium

2

wood

2

aluminum

1

copper

1

iron

1

PlexiGlass

1

Solar cells

1

Radiometer

4

Object Component

2

Equipment

1

Measuring Instrument

1

Power Producing Equipment

1