Crookes spinthariscope slides made from radium (said to have been sent by Madame Curie) Crookes spinthariscope slides made from radium
Spinthariscope. 1" diameter x 1 5/8" long. Manufactured by Negretti & Zambra. Engraved: W. Crookes, 1903. spinthariscope 1903
Crookes spinthariscope signed "Armbrecht, Nelson and Co., Duke St, Grovenor Square, W" and marked "SPINTHARISCOPE 2 CROOKES 1903" early 20th century. Spinthariscope 1903
