The liquid air machine at the University is now up and ready for business, with the exception of two udíqiportaat pipe connections wbich are used to keep the journals cool. It seetns that the.Geriuan manufacturers thought that these pipes could be easily procured in this country and did not send them. i)r. Freer has placed ai order for them and expeets them hare next week. Dr. Freer was anxious to kaow ïf the machine is a success, and detnonstrated that it was by inanufacturing some of the product Thursday. When the aew connections are put in, he will make some of the experimente which are so interesting.