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You searched for: Name Helfand, William Form/Genre Engravings Subject Scientists

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1. Watt.

Date:: [not before 1832]
Collection:: Edgar Fahs Smith Image Collection (University of Pennsylvania)

2. Sr. Isaac Newton.

Date:: 1748
Collection:: Edgar Fahs Smith Image Collection (University of Pennsylvania)

3. Sir Isaac Newton.

Date:: [not before 1670]
Collection:: Edgar Fahs Smith Image Collection (University of Pennsylvania)

4. The Hon. Robert Boyle. OB, 1691.

Date:: [18-?]
Collection:: Edgar Fahs Smith Image Collection (University of Pennsylvania)

5. Sir Humphry Davy, Bart. Pres. R.S. & c.

Date:: 1821
Collection:: Edgar Fahs Smith Image Collection (University of Pennsylvania)

6. James Watt, Esqr. FRL. Etc. Etc.

Date:: 1820
Collection:: Edgar Fahs Smith Image Collection (University of Pennsylvania)

7. Sir Humphrey Davy

Date:: 182-?]
Collection:: Edgar Fahs Smith Image Collection (University of Pennsylvania)

8. Sir Isaac Newton

Date:: [between 1790 and 1841]
Collection:: Edgar Fahs Smith Image Collection (University of Pennsylvania)

9. J. Watt.

Date:: [not before 1801]
Collection:: Edgar Fahs Smith Image Collection (University of Pennsylvania)

10. James Watt Esqr. F.R.L. Etc. Etc.

Date:: [not before 1801]
Collection:: Edgar Fahs Smith Image Collection (University of Pennsylvania)