Mr. Thomas Christy, Fellow of the Linnaean Society, kindly sends us an account of some new commercial drugs and plants, which have achieved some note in England - the account printed on some very beautiful paper prepared from the fibre of the "white fir" (Abies), which is probably what is known in this country as the silver fir (Abies pectinata). This wood, he says, can be delivered in England, enough to make a ton of pulp, for $20, while a ton from the famed Esparto grass costs $80. Cotton costs over $100 per ton. Cotton machinery will do to spin fibre from fir as well as from flax and other fibres. These are separable into fine film by a new chemical process. We fancy the great difficulty would be in keeping up a cheap supply of fir fibre. It may be cheaper than cotton now, but it takes many years to grow as much fir wood as we could grow cotton in one year, from the same acreage, and this must tend to increase the price to the continuous demand, while cotton is already at its highest price.