Serapio, or Serapio Mauritania (Yuhanná ibn Sarapion), [2], [6].

Severtius, Jacobus, [5].

shielding, magnetick, by iron plate, [83], [85].

siderites (σιδερίτης) [8], [11], [143].

siegelstein [11].

silk suspension for magnetick iron, [29], [30].

Silvaticus, Matthæus, [3].

silver, loadstone for, [109], [110].

similars, doctrine of attraction of, [50], [62].

Simon Stevinus, *[v] bis, [167], [168].