Photos of Tube Collection
Page 7 of 8
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N67: N-N
N68: N-N
N69: N-N
N70: N-N
N71: N-N
N72: N-N
N73: N-N
P01: P&S
P02: P&S (unglazed)
P03: P.&S. (unglazed)
| P04: | P.&S. (unglazed) |
| P05: | P&S // PAT. JUNE 14 1892 (unglazed with projections) |
| P06: | P&S // PAT. JUNE 14 1892 (unglazed with projections) |
| P07: | P.&S. (unglazed) |
P08 (top): PAT. JUNE 14 1892 (P&S, unglazed with projections) P09 (bottom): P&S // PAT. JUNE 14 1892 (unglazed with projections)
P10: P.&S. (unglazed)
P11: P&S (unglazed)
P12: P.&S. // PAT. JUNE 14 1892 (with projections) (unglazed)
P13: P&S (unglazed)