Identify premises and conclusion of argument. Is the argument inductive or deductive? If deductive is it valid or invalid? If inductive is it a strong or weak argument?

Argument:
Johnston compared the effects of smoking with this of hypodermically injected nicotine. The smokes almost invariably thought the sensation pleasant, although nonsmokers usually termed it "queer". Johnston, who gave himself 80 injections of 1.3 mg of nicotine from three to four times a day, found that he preferred the hypodermic injections of nicotine to inhaling a cigarette. In this case, it would appear that nicotine was the major factor in the pleasant sensation due to smoking.

Please explain reasoning