exposed　to　air　from　a　great　height；　or　from　some　very　quiet　cellar；　you
  will　often　not　find　a　single　trace　of　life。
  So　that　M。　Pasteur　arrived　at　last　at　the　clear　and　definite　result；
  that　all　these　appearances　are　like　the　case　of　the　worms　in　the　piece
  of　meat；　which　was　refuted　by　Redi；　simply　germs　carried　by　the　air　and
  deposited　in　the　liquids　in　which　they　afterwards　appear。　　For　my　own
  part；　I　conceive　that；　with　the　particulars　of　M。　Pasteur's　experiments
  before　us；　we　cannot　fail　to　arrive　at　his　conclusions；　and　that　the
  doctrine　of　spontaneous　generation　has　received　a　final　'coup　de
  grace'。
  You；　of　course；　understand　that　all　this　in　no　way　interferes　with　the
  'possibility'　of　the　fabrication　of　organic　matters　by　the　direct
  method　to　which　I　have　referred；　remote　as　that　possibility　may　be。
  ＇Footnote＇　1　Those　who　wish　to　study　fully　the　doctrines　of
  which　I　have　endeavoured　to　give　some　rough　and　ready
  illustrations；　must　read　Mr。　John　Stuart　Mill's　'System　of
  Logic'。
  End