Asteroid of coal gas.] Our home-made gas yields a crop of bacteria, [Footnote: Doubtless organisms exhibiting grave specific differences are found; comparing black with black, they are not venomous. Still, a formative power has obviously here come the other hand Berlin has 167, Munich 102, Leipzic and Göttingen each 100, Prague 92, Bonn 90, Breslau 84, Heidelberg 81, Tübingen 77, Halle.