Encyclopaedia Britannica 
Encyclopaedia Britannica is one of the most accurate and famous encyclopaedias. Also it is the oldest encyclopaedias and a general encyclopaedia in English that grew rapidly in size and popularity. It is a Scottish founded in 1768 in the Scottish city of Edinburgh , but now it is American company. It targets educated readers and intellectuals, and it was run by its founders Colin Macfarquhar and an engraver Andrew Bell who formed a partnership and created a new book, the three-volume work was developed by one author, William Smelly where the first edition was published in 1768. The ownership of the encyclopaedia went from Sears Roebuck to William Benton to Jacqui Safra who gained ownership in 1996.

            Nicotine Levels in Electronic Cigarettes
This journal article is about nicotine levels in electronic cigarettes. It includes information such as the extent of effectiveness of electronic cigarettes and its use and promotion as an alternative to regular cigarettes. The article says that electronic cigarettes are a tool that is used to inhale nicotine which is liquid and is heated and converted into vapor, and comes in several forms.The reporter indicated that the method of analysing nicotine level with gas chromatography was conducted by placing sixteen electronic cigarettes where an automatic smoking machine was used to create vapors. In result, from a cartridge vaporise the entire level of nicotine in vapor ranged by rate 50_60 % of nicotine. These leads to illustrate that study showed that the toxins found in conventional cigarettes are more than electronic which has various models and sizes that develop over time.

Oxford Journal Articles