[84] M: pp. 68, 70-71, 97, 129, 179-180, 311, 315, 317-335 Gilbert implied (M: p. 166), that a terrella does not rotate as Peregrinus said, due to resistance (M: p. 326), or due to the mutual nature of coition (M: p. 166); or even to the rotation of the earth (M: p. 332). However (M: p. 129), he also mentioned that a terrella would revolve by itself!
[85] M: pp. 78, 82, 84, 86.
[86] M: pp. 78, 89, 91.
[87] M: pp. 89, 95.
[88] M: pp. 83, 86.
[89] M: pp. 81, 86, 87.
[90] M: pp. 80, 81, 86, 87.
[91] M: p. 79.
[92] M: pp. 77-78, 79.
[93] M: p. 78. The definition Gilbert gave of an electric in the glossary at the beginning of his treatise was not an experimental one: "Electricae, quae attrahunt eadem ratione ut electrum."