tested (by the gunpowder test) before the invention of the hydrometer. The term "Navy strength" is used in modern Britain to specify spirits bottled at 57% ABV. While the ration was originally given neat or mixed with lime juice, the practice of watering down the rum began around 1740. To help minimize the effect of the alcohol on his sailors, Admiral Edward Vernon had the rum ration watered, producing a mixture that became known as grog. Many believe the term was coined in honour of the grogram cloak Admiral Vernon wore in rough weather. The Royal Navy continued to give its sailors a daily rum ration, known as a "tot", until the practice was abolished on 31 July 1970. Today, a tot (totty) of rum is still issued on special occasions, using an order to "splice the mainbrace", which may only be given by a member of the royal family or, on certain occasions, the admiralty board in the UK, with similar restrictions in other Commonwealth navies. Recently, such occasions have included royal marriages or birthdays, or special anniversaries. In the days of daily rum rations, the order to "splice the mainbrace" meant double rations would be issued. A legend involving naval rum and Horatio Nelson says that following his victory and death at the Battle of Trafalgar, Nelson's body was preserved in a cask of rum to allow transportation back to England. Upon arrival, however, the cask was opened and found to be empty of rum. The [pickled] body was removed and, upon inspection, it was discovered that the sailors had drilled a hole in the bottom of the cask and drunk all the rum, hence the term "Nelson's blood" being used to describe rum. It also serves as the basis for the term tapping the admiral being used to describe surreptitiously sucking liquor from a cask through a straw. The details of the story are disputed, as many historians claim the cask contained French brandy, whilst others claim instead the term originated from a toast to Admiral Nelson. Variations of the story, involving different notable corpses, have been in circulation for many years. The official record states merely that the body was placed in "refined spirits" and does not go into further detail. The Royal New Zealand Navy was the last naval force to give sailors a free daily tot of rum. The Royal Canadian Navy still gives