Geologists 19th century
Giovanni Battista Brocchi was an Italian mineralogist, geologist and paleontologist.
Brocchi studied law at the University of Padua, but was seriously interested in natural sciences and mineralogy. In 1802, Brocchi became a teacher of natural history at the Brescia Gymnasium. Appointment in 1808 as inspector of mines in Milan gave him the opportunity to travel extensively in Italy, making extensive notes and collecting numerous samples. The fruits of these labors appeared in various publications, notably his "Treatise mineralogical and chemical on the iron mines of the department of Mella" (1808). He then obtained a position as inspector of mining in the newly created kingdom of Italy.
In 1811 Brocchi wrote a valuable essay entitled "Mineralogical Memoirs on the Fassa Valley in the Tyrol." He made his first extensive exploration of central Italy in 1811-1812, witnessed the eruption of Vesuvius, and was able to compare the condition of its crater before and after the eruption. But his most important work is Fossils of the Sub-Apennines with geological observations on the Apennines and adjacent soil (1814), which contains precise details of the structure of the Apennine ridge and an account of the fossilization of Italian Tertiary strata in comparison with existing species. Brocchi also wrote several significant works on biology.
In the fall of 1822 he sailed from Trieste to Egypt, whence he made excursions up the Nile and into Syria and Palestine. In 1826 he contracted the bubonic plague, of which he died. His last journals and collections are preserved at the Museo Civico in Bassano. In all, Brocchi published five voluminous books and about seventy articles in various journals.
Sir William Douglas Hamilton was a British diplomat, archaeologist and volcanologist, a famous collector, and a Fellow of the Royal Society of London.
He served as British Ambassador to the Kingdom of Naples from 1764 to 1800, but most importantly, he was a passionate researcher of history, art and natural sciences and was a member of the Society of Dilettantes, established for the purpose of studying ancient art.
In Naples, Hamilton amassed a unique collection of antique vases and published an illustrated book about them. In parallel, Sir Hamilton studied the volcanoes Vesuvius and Etna, local volcanic and seismic activity, and the causes of earthquakes in the Neapolitan territory. As a corresponding member of the Royal Society, he sent the results of his research to London. His publications were very valuable for the time.
Peter Simon Pállas was a German and Russian scientist-encyclopedist, naturalist and traveler, who gave almost all his life to the service of Russia.
The breadth of his scientific interests made him a true encyclopedist, but he was particularly interested in natural sciences. By the age of 25, Pallas had already acquired European fame as a major scientist-naturalist. At the same time he received an invitation from the St. Petersburg Academy of Sciences, where he was offered a professorship. In 1767, Pallas arrived in St. Petersburg with his wife and soon led several important expeditions to Siberia and southern Russia. In his numerous ethnographic descriptions, the scientist was the first to report in detail on the Kalmyks, Tatars, Mordvins, Chuvashs, Nagaians, Tungus (Evenks), Votyaks (Udmurts), and Cheremis (Mari). In addition, he brought with him large natural-scientific collections. Later he traveled with scientific expeditions to Kamchatka, the Kuril Islands, Crimea and other previously unexplored lands.
In 1785 Catherine II attracted Pallas to the collection and comparative analysis of the languages of the peoples inhabiting America, Asia, Europe and Russia, and he compiled and published a comparative dictionary in two parts (1787-1789), in which more than 200 languages and dialects of the peoples of Asia and Europe were presented. In the last years of his life, among other things, Pallas was engaged in the preparation of a fundamental three-volume work on the fauna of Russia, Zoographia rosso-asiatica ("Russian-Asiatic Zoology"), in which more than 900 species of vertebrates, including 151 species of mammals, of which about 50 new species were introduced. This work was so extensive, and the descriptions of the animals were so thorough and detailed, that until the early 20th century the book remained the main source of knowledge about the fauna of Russia. In 1810. Peter Pallas went to Berlin to prepare illustrations for this work, but a year later the famous scientist died and was buried in Berlin.
A volcano in the Kuril Islands, a reef off New Guinea, and many animals and plants are named after Pallas.
Giovanni Vincenzo Petrini was an Italian priest and theologian, philosopher, mathematician, and expert in mineralogy.
Along with Scipio Breislacus, Petrini was one of the founders of Italian volcanology. He taught philosophy and mathematics, theology, but specialized in mineralogy and created the Mineralogical Cabinet in Nazareth. This museum was famous in Europe and was visited, among others, by Emperor Joseph II, who gave him rare specimens from the lands of the Empire and especially from Hungary.
Giovanni Petrini was the author of the catalog Gabinetto mineralogico del Collegio Nazareno ("The Mineralogical Cabinet of the Nazarene Collegium, described by external features and distributed by component parts" (Rome, 1791-1792). The specimens in it are classified according to a standard structure: salts, earths, bitumens, combustibles, and metals. There is also a section on gemstones.
Johann Baptist Emanuel Pohl was an Austrian and Czech scientist, botanist, naturalist, and traveler.
Pohl studied in Prague, earned a doctorate in medicine and practiced science, becoming one of the most prominent botanists in Bohemia. Consequently, he was invited on an expedition to Brazil. Johann Pohl arrived in Brazil in 1817 with the Italian botanist Giuseppe Raddi as part of a large scientific expedition sent by Francis I of Austria, and spent four years traveling through the states of Minas Gerais, Goias, Bahia, and Rio de Janeiro, including some 30 rivers in the country. He collected thousands of plant specimens, as well as studying minerals and zoology, exploring gold and diamond mines, caves, and villages of local people.
After his return to Europe, Pohl served as curator of the Vienna Museum of Natural History and the Museum of Brazil in Vienna until his death. His extensive collections, including some 4,000 plant specimens, were housed here along with the expedition's other scientific collections.
Franz Edler von Hauslab or Franz Ritter von Hauslab was an Austrian military commander, military educator, cartographer, geologist and artist.
He graduated from the engineering academy and then taught at it, achieving great success in topography and cartography. During the Austro-Italian-French War in 1859 he commanded artillery.
Von Hauslab was engaged in geological research and published several scientific works. He introduced a number of innovations in Austrian cartography, such as creating a color scale for contour lines on maps and introducing color lithography to cartography. Von Hauslab was a member of many learned societies.