A second New Haven gastronomical claim to fame is Louis' Lunch, which is located in a small brick building on Crown Street and has been serving fast food since 1895. Though fiercely debated, the restaurant's founder Louis Lassen is credited by the Library of Congress with inventing the hamburger and steak sandwich. Louis' Lunch broils hamburgers, steak sandwiches and hot dogs vertically in original antique 1898 cast iron stoves using gridirons, patented by local resident Luigi Pieragostini in 1939, that hold the meat in place while it cooks.
What specifically how does Louis' Lunch cooks its' food?
1898 cast iron stoves using gridirons

Exclusive Jurisdiction is a concept whereby only one Grand Lodge will be recognised in any geographical area. If two Grand Lodges claim jurisdiction over the same area, the other Grand Lodges will have to choose between them, and they may not all decide to recognise the same one. (In 1849, for example, the Grand Lodge of New York split into two rival factions, each claiming to be the legitimate Grand Lodge. Other Grand Lodges had to choose between them until the schism was healed.) Exclusive Jurisdiction can be waived when the two over-lapping Grand Lodges are themselves in Amity and agree to share jurisdiction (for example, since the Grand Lodge of Connecticut is in Amity with the Prince Hall Grand Lodge of Connecticut, the principle of Exclusive Jurisdiction does not apply, and other Grand Lodges may recognise both).
What is Exclusive Jurisdiction?
only one Grand Lodge will be recognised in any geographical area

The development of a three-field rotation system for planting crops[AA] increased the usage of land from one half in use each year under the old two-field system to two-thirds under the new system, with a consequent increase in production. The development of the heavy plough allowed heavier soils to be farmed more efficiently, aided by the spread of the horse collar, which led to the use of draught horses in place of oxen. Horses are faster than oxen and require less pasture, factors that aided the implementation of the three-field system.
What invention led to an increase in efficiency in the farming of heavy soils?
the heavy plough