Touching miscellaneous matters, there is the machine for making envelopes lately invented at Birmingham, where it was exhibited to several members of the British Association. It is constructed on the pneumatic principle, is beautifully simple and effective, and can be produced at a cost of L.25. You are to imagine the prepared sheets of which the envelopes are to be formed placed in a small chamber or receptacle, upon which a bellows-box descends, lifts off the upper sheet, transfers it to a mould, which gives the size, and pinches the corners; then, instead of metallic thumbs to rub down each angular flap, a blast of air enters and effects the purpose; away goes the envelop to be gummed, and drops finished into the receiver, at a rate, it is said, exceeding anything yet accomplished. Then there are Professor Schroeter's experiments on phosphorus, producing what he calls the 'allotropic condition.' In few words, when exposed to light and heat of different temperatures, phosphorus undergoes remarkable changes; no real chemical alteration takes place, yet there seems to be an entire conversion into other substances. One effect of the modifications is to render the manipulation of phosphorus harmless without destroying its properties; and the professor, more fortunate than scientific men generally, has received a liberal sum from a Birmingham manufacturer as the price of his discovery. And _last_, what think you of a mechanical leech, to supersede the little black snake which so often makes patients shudder? A scientific instrument with such a name has been invented by M. Alexander, a civil engineer in Paris. It has been tried in some of the hospitals, and according to the reports, is a more effectual leech than the natural one. In a former 'gossip' I mentioned Dr Mantell and his iguanodon: he (the doctor, not the reptile) has a batch of new 'Wonders of Geology.' An arm-bone of a _saurian_, nearly five feet in length, the original possessor of which must have been as much larger than the iguanodon as the latter is than a modern crocodile: the monster is to be called the _Colosso-saurus_. In addition there is a 'consignment' of _dinornis_ bones from New Zealand, still further exemplifying the gigantic scale of pre-Adamite creation. They will doubtless be brought before the public in some of the doctor's popular lectures. The return of Sir James Ross and Sir John Richardson from the Arctic regions without any intelligence of Franklin and his adventurous band of explorers has created both surprise and pain. Sir James, it appears, was driven home by ice-drifts against his will and against his instructions, and the consequence will be another expedition next spring, should nothing in the meantime be heard of Sir John Franklin by way of Behring's Straits or Russia. Notwithstanding the sums already lavished on these next to useless expeditions, a search must still be made for the party who have now been four years exposed to polar frosts.