станица Терской области, в долине, вдоль левого берега реки Подкумок, на высоте 603 м над поверхностью моря, в 15 верстах от города Пятигорска. Название свое получила от реки Ессентук, впадающей ниже станицы в реку Подкумок. Известна своими минеральными источниками. Первое сообщение о них принадлежит знаменитому филантропу и врачу Гаазу (см.), в 1810 г. Настоящая известность их начинается со времен д-ра Нелюбина, описавшего в 1823 г. 23 источника, из числа которых №№ 1-18 отнесены к группе щелочных источников, а 19-23 к группе серно-щелочных. Первоначально все место, где находились источники, принадлежало казачьему войску, но в 1847 г. источники, со всей ближайшей окружающей местностью, поступили в собственность казны. Наибольшей известностью пользуются №№ 4, 18 и 17. Первые анализы их, произведенные Нелюбиным и Фритче, в настоящее время имеют только историческое значение. В прилагаемой таблице приведены анализы Шмидта в 1865-67 гг. и Фомина в 1884-1885 гг.:
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[c white]|[/c] Название источников [c white]|[/c] Ессентуки № 4 [c white]|[/c] Ессентуки № 18 [c white]|[/c] Ессентуки № 17 [c white]|[/c]
[c white]|[/c] [c white]|[/c] [c white]-[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c]
[c white]|[/c] [c white]|[/c] Смешанный [c white]|[/c] восходящая [c white]|[/c] нисходящая [c white]|[/c] [c white]|[/c] [c white]|[/c]
[c white]|[/c] [c white]|[/c] (старый) [c white]|[/c] струя [c white]|[/c] струя [c white]|[/c] [c white]|[/c] [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Аналитики: [c white]|[/c] Шмидт [c white]|[/c] Фомин [c white]|[/c] Шмидт [c white]|[/c] Фомин [c white]|[/c] Шмидт [c white]|[/c] Лаборатория [c white]|[/c] Фомин [c white]|[/c]
[c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] горного [c white]|[/c] [c white]|[/c]
[c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] института [c white]|[/c] [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Время анализа [c white]|[/c] 1867 [c white]|[/c] 1885 [c white]|[/c] 1892 [c white]|[/c] 1892 [c white]|[/c] 1865 [c white]|[/c] 1884 [c white]|[/c] 1892 [c white]|[/c] 1867 [c white]|[/c] 1876 [c white]|[/c] 1884 [c white]|[/c] 1892 [c white]|[/c]
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[c white]|[/c] t° по Р. [c white]|[/c] 8,5° [c white]|[/c] 7,2° [c white]|[/c] 9,25° [c white]|[/c] 8,75° [c white]|[/c] 9,2° [c white]|[/c] 9,5° [c white]|[/c] 9,0° [c white]|[/c] - [c white]|[/c] - [c white]|[/c] 9,5° [c white]|[/c] 9,0° [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Удельный вес [c white]|[/c] 1,00554 [c white]|[/c] 1,00566 [c white]|[/c] 1,00406 [c white]|[/c] 1,00649 [c white]|[/c] 1,00980 [c white]|[/c] 1,00910 [c white]|[/c] 1,00938 [c white]|[/c] 1,00975 [c white]|[/c] 1,00834 [c white]|[/c] 1,00814 [c white]|[/c] 1,00880 [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Найденные составные [c white]|[/c] [c white]|[/c]
[c white]|[/c] части в 1000 куб. см воды: [c white]|[/c] [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Сухого остатка (сум. пл. [c white]|[/c] 5,76800 [c white]|[/c] 5,87600 [c white]|[/c] 4,18400 [c white]|[/c] 6,51200 [c white]|[/c] 9,14100 [c white]|[/c] 9,32600 [c white]|[/c] 9,36400 [c white]|[/c] 8,70610 [c white]|[/c] 8,49564 [c white]|[/c] 8,61100 [c white]|[/c] 8,84300 [c white]|[/c]
[c white]|[/c] вещ.) [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Угольной кислоты (СО2) [c white]|[/c] 3,40520 [c white]|[/c] 3,33664 [c white]|[/c] 1,04765 [c white]|[/c] 4,26690 [c white]|[/c] 6,40050 [c white]|[/c] 6,35197 [c white]|[/c] 6,35412 [c white]|[/c] 5,16860 [c white]|[/c] 4,20310 [c white]|[/c] 4,72779 [c white]|[/c] 5,22156 [c white]|[/c]
[c white]|[/c] всей [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Угольной кислоты [c white]|[/c] 1,13520 [c white]|[/c] 1,19763 [c white]|[/c] 1,47521 [c white]|[/c] 1,58163 [c white]|[/c] 2,18540 [c white]|[/c] 2,27718 [c white]|[/c] 2,27694 [c white]|[/c] - [c white]|[/c] - [c white]|[/c] 1,99134 [c white]|[/c] 2,12856 [c white]|[/c]
[c white]|[/c] связанной [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Серного ангидрида (SO3) [c white]|[/c] 0,49033 [c white]|[/c] 0,36910 [c white]|[/c] 1,12854 [c white]|[/c] - [c white]|[/c] - [c white]|[/c] следы [c white]|[/c] - [c white]|[/c] 0,01052 [c white]|[/c] 0,05240 [c white]|[/c] 0,06047 [c white]|[/c] 0,18554 [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Кремневого ангидрида (SiO [c white]|[/c] 0,02050 [c white]|[/c] 0,02064 [c white]|[/c] 0,00261 [c white]|[/c] 0,02211 [c white]|[/c] 0,01560 [c white]|[/c] 0,01360 [c white]|[/c] 0,01402 [c white]|[/c] 0,01330 [c white]|[/c] 0,02420 [c white]|[/c] 0,06860 [c white]|[/c] 0,01892 [c white]|[/c]
[c white]|[/c] 2) [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Фосфорного ангидрида (P2 [c white]|[/c] следы [c white]|[/c] - [c white]|[/c] - [c white]|[/c] - [c white]|[/c] 0,00446 [c white]|[/c] - [c white]|[/c] - [c white]|[/c] - [c white]|[/c] - [c white]|[/c] - [c white]|[/c] [c white]|[/c]
[c white]|[/c] O3) [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c] [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Хлора (Cl) [c white]|[/c] 1,32000 [c white]|[/c] 1,36346 [c white]|[/c] 0,45794 [c white]|[/c] 1,67798 [c white]|[/c] 2,32814 [c white]|[/c] 2,21895 [c white]|[/c] 2,21863 [c white]|[/c] 2,19710 [c white]|[/c] 2,22840 [c white]|[/c] 2,15944 [c white]|[/c] 2,14708 [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Брома (Br) [c white]|[/c] 0,00676 [c white]|[/c] 0,00413 [c white]|[/c] - [c white]|[/c] 0,00498 [c white]|[/c] 0,00400 [c white]|[/c] 0,00483 [c white]|[/c] 0,00483 [c white]|[/c] 0,00376 [c white]|[/c] 0,00420 [c white]|[/c] 0,00458 [c white]|[/c] 0,00460 [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Йода (I) [c white]|[/c] 0,00017 [c white]|[/c] 0,00023 [c white]|[/c] - [c white]|[/c] 0,00048 [c white]|[/c] 0,00032 [c white]|[/c] 0,00056 [c white]|[/c] 0,00055 [c white]|[/c] 0,00026 [c white]|[/c] 0,00090 [c white]|[/c] 0,00048 [c white]|[/c] 0,00048 [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Окиси калия (K2О) [c white]|[/c] 0,02002 [c white]|[/c] 0,02104 [c white]|[/c] 0,00235 [c white]|[/c] 0,02147 [c white]|[/c] 0,01497 [c white]|[/c] 0,02050 [c white]|[/c] 0,01984 [c white]|[/c] 0,01084 [c white]|[/c] 0,03363 [c white]|[/c] 0,01646 [c white]|[/c] 0,01744 [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Окиси натрия (Na2O) [c white]|[/c] 2,32000 [c white]|[/c] 2,74025 [c white]|[/c] 1,87002 [c white]|[/c] 3,34998 [c white]|[/c] 3,9717 [c white]|[/c] 4,80491 [c white]|[/c] 4,80121 [c white]|[/c] 4,47800 [c white]|[/c] 4,39495 [c white]|[/c] 4,40141 [c white]|[/c] 4,47929 [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Окиси лития (Li2O) [c white]|[/c] следы [c white]|[/c] следы [c white]|[/c] - [c white]|[/c] 0,00378 [c white]|[/c] 0,00211 [c white]|[/c] 0,00578 [c white]|[/c] 0,00564 [c white]|[/c] 0,00178 [c white]|[/c] следы [c white]|[/c] 0,00491 [c white]|[/c] 0,00458 [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Окиси бария (BaO) [c white]|[/c] - [c white]|[/c] следы [c white]|[/c] - [c white]|[/c] следы [c white]|[/c] 0,00249 [c white]|[/c] следы [c white]|[/c] 0,00158 [c white]|[/c] 0,00152 [c white]|[/c] следы [c white]|[/c] 0,00152 [c white]|[/c] 0,00147 [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Окиси стронция (SrO) [c white]|[/c] - [c white]|[/c] следы [c white]|[/c] - [c white]|[/c] следы [c white]|[/c] 0,00302 [c white]|[/c] следы [c white]|[/c] 0,00188 [c white]|[/c] 0,00216 [c white]|[/c] следы [c white]|[/c] 0,00184 [c white]|[/c] 0,00186 [c white]|[/c]
[c white]|[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]-[/c] [c white]|[/c]
[c white]|[/c] Окиси кальция (CaO) [c white]|[/c] 0,12992 [c white]|[/c] 0,17392 [c white]|[/c] 0,14862 [c white]|[/c] 0,23421 [c white]|[/c] 0,20743 [c white]|[/c] 0,20738[b] [/