Question: What year did  the women of Boston produce 40,000 skeins of yarn, and 180 women in Middletown, Massachusetts wove of cloth?
About the article "American Revolution", section "Role of women".

Candidate passages:
Women contributed to the American Revolution in many ways, and were involved on both sides.
While formal Revolutionary politics did not include women, ordinary domestic behaviors became charged with political significance as Patriot women confronted a war that permeated all aspects of political, civil, and domestic life.
They participated by boycotting British goods, spying on the British, following armies as they marched, washing, cooking, and tending for soldiers, delivering secret messages, and in a few cases like Deborah Samson, fighting disguised as men.
Also, Mercy Otis Warren held meetings in her house and cleverly attacked Loyalists with her creative plays and histories.
Above all, they continued the agricultural work at home to feed their families and the armies.
They maintained their families during their husbands' absences and sometimes after their deaths.
American women were integral to the success of the boycott of British goods, as the boycotted items were largely household items such as tea and cloth.
Women had to return to knitting goods, and to spinning and weaving their own cloth — skills that had fallen into disuse.
In 1769, the women of Boston produced 40,000 skeins of yarn, and 180 women in Middletown, Massachusetts wove of cloth.
A crisis of political loyalties could disrupt the fabric of colonial America women's social worlds: whether a man did or did not renounce his allegiance to the King could dissolve ties of class, family, and friendship, isolating women from former connections.
A woman's loyalty to her husband, once a private commitment, could become a political act, especially for women in America committed to men who remained loyal to the King.
Legal divorce, usually rare, was granted to Patriot women whose husbands supported the King.
The Yangshao culture produced silk to a small degree and wove hemp.
Men wore loin cloths and tied their hair in a top knot.
Women wrapped a length of cloth around themselves and tied their hair in a bun.
The wealthy could wear silk. 
Massachusetts became a leader in industrial innovation and development during the 19th century.
Since colonial times, there had been a successful iron making industry in New England.
The first successful ironworks in America was established at Saugus in 1646, utilizing bog iron from swamps to produce plows, nails, firearms, hoops for barrels and other items necessary for the development of the Colony.
Other industries would be established during this period, such as shipbuilding, lumber, paper and furniture making.
These small-scale shops and factories often utilized the State's many rivers and streams to power their machinery.
While Samuel Slater had established the first successful textile mill at Pawtucket, Rhode Island in 1793, there remained no way to efficiently mass-produce cloth from the spun yarn produced by the early mills.
The yarn was still outsourced to small weaving shops where it was woven into cloth on hand looms.
The first woolen mill, and the second textile mill in the Blackstone Valley, was a "wool carding mill", established in 1810 by Daniel Day, near the West River and Blackstone River at Uxbridge, Massachusetts.
Then, in 1813, a group of wealthy Boston merchants led by Francis Cabot Lowell, known as the Boston Associates, established the first successful integrated textile mill in North America at Waltham.
Lowell had visited England in 1810 and studied the Lancashire textile industry.
Because the British government prohibited the export of this new technology, Lowell memorized plans for the power looms on his return trip to Boston.
With the skill of master mechanic Paul Moody, the first successful power looms were produced, harnessing the power of the Charles River.
For the first time, all phases of textile production could now be performed under one roof, greatly increasing production, and profits.
This was the real beginning of the Industrial Revolution in America.
With the early success of the Boston Manufacturing Company at Waltham, the Boston Associates would also later establish several other textile towns, including Lowell in 1823, Lawrence in 1845, Chicopee in 1848 and Holyoke in 1850.
Lowell grew quickly to a city of 33,000 people by 1850.
Its mills were highly integrated and centrally controlled.
An ingenious canal system provided the water power that drove the machinery.
Steam power would be introduced beginning in the 1850s.
The mill owners initially employed local farm women, often recruited from poor, remote parts of New England, and attempted to create a Utopian industrial society by providing housing, churches, schools and parks for their workers, unlike their English counterparts.
Eventually, as the mills grew larger and larger, the owners turned to newly arrived Irish immigrants to fill their factories.
Industrial cities, especially Worcester and Springfield, became important centers in textile machinery (in Worcester's case) and precision tool production and innovation (in Springfield's case.)
While Boston did not have many large factories, it became increasingly important as the business and transportation hub of all of New England, as well as a national leader in finance, law, medicine, education, arts and publishing. 
Silk is produced year round in Thailand by two types of silkworms, the cultured Bombycidae and wild Saturniidae.
Most production is after the rice harvest in the southern and northeast parts of the country.
Women traditionally weave silk on hand looms, and pass the skill on to their daughters as weaving is considered to be a sign of maturity and eligibility for marriage.
Thai silk textiles often use complicated patterns in various colours and styles.
Most regions of Thailand have their own typical silks.
A single thread filament is too thin to use on its own so women combine many threads to produce a thicker, usable fiber.
They do this by hand-reeling the threads onto a wooden spindle to produce a uniform strand of raw silk.
The process takes around 40 hours to produce a half kilogram of Thai silk.
Many local operations use a reeling machine for this task, but some silk threads are still hand-reeled.
The difference is that hand-reeled threads produce three grades of silk: two fine grades that are ideal for lightweight fabrics, and a thick grade for heavier material.
The silk fabric is soaked in extremely cold water and bleached before dyeing to remove the natural yellow coloring of Thai silk yarn.
To do this, skeins of silk thread are immersed in large tubs of hydrogen peroxide.
Once washed and dried, the silk is woven on a traditional hand operated loom. 
Knitting materials.
Yarn for hand-knitting is usually sold as balls or skeins (hanks), although it may also be wound on spools or cones.
Skeins and balls are generally sold with a "yarn-band", a label that describes the yarn's weight, length, dye lot, fiber content, washing instructions, suggested needle size, likely gauge, etc.
It is common practice to save the yarn band for future reference, especially if additional skeins must be purchased.
Knitters generally ensure that the yarn for a project comes from a single dye lot.
The dye lot specifies a group of skeins that were dyed together and thus have precisely the same color; skeins from different dye-lots, even if very similar in color, are usually slightly different and may produce a visible stripe when knitted into the same project.
If a knitter buys insufficient yarn of a single dye lot to complete a project, additional skeins of the same dye lot can sometimes be obtained from other yarn stores or online.
The thickness of the yarn is a significant factor in determining the gauge, i.e., how many stitches and rows are required to cover a given area for a given stitch pattern.
Thicker yarns generally require thicker knitting needles, whereas thinner yarns may be knit with thick or thin needles.
Hence, thicker yarns generally require fewer stitches, and therefore less time, to knit up a given garment.
Patterns and motifs are coarser with thicker yarns; thicker yarns produce bold visual effects, whereas thinner yarns are best for refined patterns.
Yarns are grouped by thickness into six categories: superfine, fine, light, medium, bulky and superbulky; quantitatively, thickness is measured by the number of wraps per inch (WPI).
The related "weight per unit length" is usually measured in tex or dernier.
In addition to choosing the correct thickness for the gauge, the knitter must also pick the type of yarn fiber.
There are currently about fifteen types of yarn fiber, falling into two categories, natural and synthetic.
Natural fibers are those that are obtained from a plant or an animal and have different attributes depending on the animal/plant they are harvested from which must be taken into account when considering the uses of a finished knitting object.
Example: Wool is well suited to items which will be used to hold in heat, even when damp, such as winter hats and mittens.
Linen, however, would be well suited to a light summer sweater when breath ability is a factor.
Synthetic fibers are made by forcing a thick solution of polymerized chemicals through spinneret nozzles and hardening the resulting filament in a chemical bath.
Natural fibers are generally softer and more comfortable whereas synthetics are durable and easier to dye.
Some fibers can be harder to knit with than others for a variety of reasons.
cotton, for example, doesn’t stretch as much as wool, and as such requires the knitter to work harder to maintain gauge.
Before knitting, the knitter will typically transform a hank into a ball where the yarn emerges from the center of the ball; this making the knitting easier by preventing the yarn from becoming easily tangled.
This transformation may be done by hand, or with a device known as a ballwinder.
When knitting, some knitters enclose their balls in jars to keep them clean and untangled with other yarns; the free yarn passes through a small hole in the jar-lid.