Conversation so far:
What experiments did James do?
He discovered that a mixture of salt, manganese dioxide and sulphuric acid could produce chlorine.
And what did this contribution do?
By 1794 Watt had been chosen by Thomas Beddoes to manufacture apparatus to produce, clean and store gases for use in the new Pneumatic Institution at Hotwells in Bristol.

Question: Who else did Watt colaborate with?
Self-contained rewrite: Aside from Thomas Beddoes, who else did Watts collaborate with?