paragraph_text: As part of the Unification of China, Qin Shi Huang (Chinese: 秦始皇; pinyin: Qín Shǐ Huáng, 260 BC – 210 BC) introduced a uniform copper coin with the inscription "Ban Liang" based on the coins previously used by Qin. All other forms of local currency were abolished. The coins were round with a square hole in the middle which was the common design for most Chinese copper coins until the 20th century. Due to the low value of an individual coin, the Chinese have traditionally strung a nominal thousand copper coins onto a piece of string. Government taxes were levied on both coins and products such as rolls of silk. Salaries were paid in "stones" (石, dàn) of grain during the Qin and Han dynasties.

paragraph_text: The Climate of Los Angeles is a year - round mild - to - hot and mostly dry climate for the Los Angeles metropolitan area in California. The climate is classified as a Mediterranean climate, which is a type of dry subtropical climate. It is characterized by seasonal changes in rainfall -- with a dry summer and a winter rainy season -- but relatively modest transitions in temperature. Under the modified Köppen climate classification, the coastal areas are classified as Csb, and the inland areas as Csa.

paragraph_text: In December 2004, PalmSource announced a new OS strategy. With the acquisition of the mobile phone software company China Mobilesoft, PalmSource planned to port Palm OS on top of a Linux kernel, while still offering both Palm OS Garnet and Palm OS Cobalt. This strategy was revised in June 2005, when still no device with Palm OS Cobalt was announced. PalmSource announced it was halting all development efforts on any product not directly related to its future Linux based platform.With the acquisition of PalmSource by ACCESS, Palm OS for Linux was changed to become the Access Linux Platform which was first announced in February 2006. The initial versions of the platform and software development kits for the Access Linux Platform were officially released in February 2007. As of January 2011, the Access Linux Platform had then yet to ship on any devices, however development kits then existed and public demonstrations had been showcased.

paragraph_text: Nigeria, like the rest of West Africa and other tropical lands, has only two seasons. These are the dry season and the rainy season. The dry season is accompanied by a dust laden airmass from the Sahara Desert, locally known as Harmattan, or by its main name, The Tropical Continental (CT) airmass, while the rainy season is heavily influenced by an airmass originating from the south atlantic ocean, locally known as the south west wind, or by its main name, The Tropical Maritime (MT) airmass. These two major wind systems in Nigeria are known as the trade winds.

paragraph_text: The Nuclear Science Department at EPN is the only one in Ecuador and has the large infrastructure, related to irrradiation factilities like cobalt-60 source and Electron beam processing.

paragraph_text: Copper is synthesized in massive stars and is present in the Earth's crust at a concentration of about 50 parts per million (ppm), where it occurs as native copper or in minerals such as the copper sulfides chalcopyrite and chalcocite, the copper carbonates azurite and malachite, and the copper(I) oxide mineral cuprite. The largest mass of elemental copper discovered weighed 420 tonnes and was found in 1857 on the Keweenaw Peninsula in Michigan, US. Native copper is a polycrystal, with the largest described single crystal measuring 4.4×3.2×3.2 cm.

paragraph_text: The book documents Gifford's 2004 trip across China National Highway 312 from Shanghai to the China-Kazakhstan border and his observations of China. Gifford was at the end of his term as a China correspondent for National Public Radio (NPR), and his experiences were the basis of several NPR stories.

paragraph_text: In 2008, Bloomberg claimed child labour in copper and cobalt mines that supplied Chinese companies in Congo. The children are creuseurs, that is they dig the ore by hand, carry sacks of ores on their backs, and these are then purchased by these companies. Over 60 of Katanga's 75 processing plants are owned by Chinese companies and 90 percent of the region's minerals go to China. An African NGO report claimed 80,000 child labourers under the age of 15, or about 40% of all miners, were supplying ore to Chinese companies in this African region. Amnesty International alleged in 2016 that some cobalt sold by Congo Dongfang Mining was produced by child labor, and that it was being used in lithium-ion batteries powering electric cars and mobile devices worldwide.

paragraph_text: Sichuan has been historically known as the "Province of Abundance". It is one of the major agricultural production bases of China. Grain, including rice and wheat, is the major product with output that ranked first in China in 1999. Commercial crops include citrus fruits, sugar cane, sweet potatoes, peaches and grapes. Sichuan also had the largest output of pork among all the provinces and the second largest output of silkworm cocoons in 1999. Sichuan is rich in mineral resources. It has more than 132 kinds of proven underground mineral resources including vanadium, titanium, and lithium being the largest in China. The Panxi region alone possesses 13.3% of the reserves of iron, 93% of titanium, 69% of vanadium, and 83% of the cobalt of the whole country. Sichuan also possesses China's largest proven natural gas reserves, the majority of which is transported to more developed eastern regions.

paragraph_text: Mali lies in the torrid zone and is among the hottest countries in the world. The thermal equator, which matches the hottest spots year-round on the planet based on the mean daily annual temperature, crosses the country. Most of Mali receives negligible rainfall and droughts are very frequent. Late June to early December is the rainy season in the southernmost area. During this time, flooding of the Niger River is common, creating the Inner Niger Delta. The vast northern desert part of Mali has a hot desert climate (Köppen climate classification (BWh) with long, extremely hot summers and scarce rainfall which decreases northwards. The central area has a hot semi-arid climate (Köppen climate classification (BSh) with very high temperatures year-round, a long, intense dry season and a brief, irregular rainy season. The little southern band possesses a tropical wet and dry climate (Köppen climate classification (Aw) very high temperatures year-round with a dry season and a rainy season.

paragraph_text: The Chinese shrew or dusky shrew ("Sorex sinalis") is a species of mammal in the family Soricidae. It is endemic to China, where it occurs in Gansu, Sichuan (including Jiuzhaigou), and Shaanxi. Its natural habitat is subtropical or tropical dry forests. It is threatened by habitat loss.

paragraph_text: Since the country is located on the Equator, the climate is consistent year-round, with the average day temperature being a humid 24 °C (75 °F) and nights generally between 16 °C (61 °F) and 21 °C (70 °F). The average yearly rainfall ranges from 1,100 millimetres (43 in) in south in the Niari Valley to over 2,000 millimetres (79 in) in central parts of the country. The dry season is from June to August while in the majority of the country the wet season has two rainfall maxima: one in March–May and another in September–November.

paragraph_text: Statewide, the highest rainfall amounts occur during the summer months. In northern Florida, there is a weak winter secondary maximum while statewide the driest months of the year are during the spring. During El Niño, Florida sees greater rainfall between November and March. Due to the lack of the secondary maximum across the peninsula, a distinct dry season is seen in the averages from winter through spring. This dry season provokes brush fires annually as temperatures rise during the late spring, before they fade during early June as the rainy season gets underway.

paragraph_text: Copper compounds in liquid form are used as a wood preservative, particularly in treating original portion of structures during restoration of damage due to dry rot. Together with zinc, copper wires may be placed over non-conductive roofing materials to discourage the growth of moss.[citation needed] Textile fibers use copper to create antimicrobial protective fabrics, as do ceramic glazes, stained glass and musical instruments. Electroplating commonly uses copper as a base for other metals such as nickel.

paragraph_text: Bewick then describes an experiment which succeeded in keeping swallows alive in Britain for several years, where they remained warm and dry through the winters. He concludes:

paragraph_text: The climate of Ghana is tropical and there are two main seasons: the wet and the dry seasons. North Ghana experiences its rainy season from March to November while South Ghana experiences its rainy season from April to mid-November. The tropical climate of Ghana is relatively mild for its latitude. The harmattan, a dry desert wind, blows in north - east Ghana from December to March, lowering the humidity and causing hotter days and cooler nights in northern part of Ghana. Average daily temperatures range from 30 ° C (86 ° F) during the day to 24 ° C (75 ° F) at night with a relative humidity between 77 percent and 85 percent. In the northern part of Ghana, there are two rainy seasons: April through June and September through November. Squalls occur in the northern part of Ghana during March and April, followed by occasional rain until August and September, when the rainfall reaches its peak. Rainfall ranges from 78 to 216 centimeters (31 to 85 inches) a year.

paragraph_text: Years Material Weight (grains) Weight (grams) 1793 -- 1795 ~ 100% copper 208 grains 13.48 1795 -- 1857 ~ 100% copper 168 grains 10.89 1856 -- 1864 88% copper, 12% nickel (also known as NS - 12) 72 grains 4.67 1864 -- 1942 bronze (95% copper, 5% tin and zinc) 48 grains 3.11 1943 zinc - coated steel (also known as 1943 steel cent) 42 grains 2.72 1944 -- 1946 brass (shell case copper) (95% copper, 5% zinc) 48 grains 3.11 1947 -- 1962 bronze (95% copper, 5% tin and zinc) 48 grains 3.11 1962 -- 1981 brass (95% copper, 5% zinc) 48 grains 3.11 1982 brass (95% copper, 5% zinc) 48 grains 3.11 copper - plated zinc (97.5% zinc, 2.5% copper) 38.6 grains 2.5 1983 -- present copper - plated zinc (97.5% zinc, 2.5% copper) 38.6 grains 2.5

paragraph_text: Cobalt (II) chloride is an inorganic compound of cobalt and chlorine, with the formula CoCl. It is usually supplied as the hexahydrate CoCl 6H O, which is one of the most commonly used cobalt compounds in the lab.

paragraph_text: The modern dry powder fire extinguisher was invented by British Captain George William Manby in 1818; it consisted of a copper vessel of 3 gallons (13.6 liters) of pearl ash (potassium carbonate) solution contained within compressed air.

paragraph_text: The area receives about 820 millimetres (32.3 in) of annual rainfall, which is concentrated from June through September/October with little or no precipitation the remainder of the year. The area has two main seasons. The rainy season runs from June to October when winds bring in tropical moisture from the sea. The dry season runs from November to May, when the air is relatively drier. This dry season subdivides into a cold period and a warm period. The cold period spans from November to February when polar air masses push down from the north and keep the air fairly dry. The warm period extends from March to May when tropical winds again dominate but do not yet carry enough moisture for rain.

Question: When is the dry season in the country that supplies copper and cobalt to China?
Answer: June to August