a catalogue of body attractive and not attractive together with experimental  observation about attraction these follow body draw amber jeat diamond saphire  carbuncle Iris the gem opale amethyst Bristollina crystal Clear glass glass of  antimony diverse flower from i sulphur mastic hard seal wax the hard Rosin  arsenic these follow body do not draw smaragd Achates horny pearl jaspis  Chalcedononius alabaster porphyry coral marble touch stone aematites or blood  stone Sinyris ivory bone Eben tree cedar cypress pitch soft Rosin camphire  galbanum ammoniac storax benjoin load stone asphaltum these body gold silver  brass iron draw not though never so fine polish in winter if the air be sharp  and clear sal set with gems rock alum and lapis in the manner of a mirror will  draw these follow body be apt to be draw if the mass of they be small Chaff  wood leave stone all metal and in the I earth water oil if there be make a  Turn-Pin of any metal after the fashion of a magnetic needle and amber be  apply to one end of it after have be gentle rub the pin will turn amber heat  by the fire be it warmish hot or set on fire it do not draw a little bar of  iron read hot flame a light candle a hot coal put nigh sheas or straw or turn  pin or compass needle do not draw amber in a great mass if it be polite draw  though not rub in a lesser quantity and in a less polite mass it draw not  without rub crystal lapis in the manner of a mirror glass and other such  electric body if burn or scorch draw not pitch the soft Rosin benjoin  asphaltum camphire galbanum ammoniac storax Assa these draw not at all when  the air be hot but when it be cool they draw weak and so that we can just  perceive they to do so reak air blow upon amber c from the mouth or from a  moist atmosphere choke the attractive virtue if a paper or a piece of linen be  put between amber and Chaff there be no motion or attraction make amber or  other electrics warm by the sunbeam have not their attractive virtue so awaken  as by rub amber rub and expose to the beam of the sun retain its attractive  force the long and do not so soon lose it as it will do in the shadow heat  derive from a burn glass to amber c do not help its attraction sulphur and  hard wax set on fire do not draw amber when immediate after rub it be apply to  a shiver or a compass needle draw best of all the electric virtue be as  vigorous for a time in its retention as it be in its first attraction flame  amber be put within the sphere of its activity be not draw by it a drop of  water amber be apply towards it be draw into a cone if electric body be rub  too hard their attraction be thereby hinder those body which in a clear sky do  scarce draw in a thick air move not at all water put upon amber choke its  attractive force though it draw the water it self fat so encompass amber that  it touch it take away its attraction but be so put betwixt it and the object  to be draw as not to touch it it do not take it away oil put upon amber hinder  not its motion neither do amber rub with the finger moisten with oil lose its  attractive virtue amber jeats and the like do more strong excite and long  retain the object they draw although the rub be but little but diamond crystal  glass ought to be rub long that they may appear hot ere they be use for  attraction flame nigh to amber though the distance be very small be not draw  by it amber c draw the smoke of a lamp new extinguish amber draw smoke more  strong when it come forth and be more gross and more weak when it ascend and  become thin a body draw by electric body be not manifest alter but only lean  it self upon they