Cloud atlas was published in 1802. It followed a similar effort in French by Jean-Baptiste Lamarck in 1801. Howard's nomenclature defined four fundamental types of clouds: cirrus or thread-cloud, cumulus or heap-cloud, stratus or flat cloud (level sheet), and nimbus or rain-cloud (see Classification of clouds). There followed a long period of development of the field of meteorology and the classification of clouds, leading up to 1896, the International Year of Clouds. The history of this period is the subject of a popular book, "The Invention of Clouds". During that time, the Englishmen Rev. Clement Ley and Hon. Ralph Abercromby, were influential.
Trick-or-treating Trick-or-treating Trick-or-treating has become a Halloween ritual custom for children and adults in many countries. The term ""trick-or-treat"", most commonly associated with the USA, but with its cultural origins in the Celtic regions of Europe, is now found in use all over the world since the spread and establishment of now popular cultural activities, previously by means of colonialism and the spread of Christianity. Typically, children in costumes travel from house to house, asking for treats with the phrase "Trick or treat". The "treat" is usually some form of candy, although in some cultures money is used instead. The "trick"