Note 489 — Chapter XVII · THE INCANDESCENT MANTLE INDUSTRY—HISTORICAL AND GENERAL INTRODUCTION
Reading edition
Vide D. R. P. 39162. Granted September 23, 1885.
[490] D. R. P. 41945.
[491] Vide, e.g. Moeller, E. 124, 1893.
Reading edition
Vide D. R. P. 39162. Granted September 23, 1885.
[490] D. R. P. 41945.
[491] Vide, e.g. Moeller, E. 124, 1893.