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In one instance two stones were seen where only one had been previously found, but this of course might with care have been effected by means of the lithotrite.

Some small filaments were subsequently removed with the lithotrite, but on microscopical examination nothing of diagnostic importance was discovered.

But it is well known that they sometimes defy all lithotrite instruments, and compel us to have recourse to the knife.

Other inventions: a combination cystoscope and radium applicator for treating tumors of the bladder; a special type of lithotrite, an instrument for crushing stones in the bladder.

The lithotrite has two blades, a “male” and a “female,” the latter fenestrated, the former solid with its surface notched.