Who established that spark and lightning were same thing?

The vapour pressure of water at 80^(@)C is 355 mm of Hg. 1 L vessel contains O_(2) at 80^(@)C , which is saturated with water and the total pressure being 760 mm of Hg. The contents of the vessel were pumped into 0.3 L vessel at the same temperature. What is the partial presure of O_(2) ?

The following table gives the information of the sales expected by a company and the actual sale during last 7 years . Draw the line graph of the information and answer the questions give below : Were the actual sale and expected sale same during which year and how much was it ?