Mr. Talbot has recently proposed some modifications in his method of preparing the calotype paper.

These are used in the calotype process.

This may be prevented by means of a process which revives the strength of the calotype pictures.

This modification would appear to unite the simplicity of photography with all the distinctness and clearness of calotype.

Again, I have learnt the calotype process for the express purpose of managing the calotype apparatus, for which