here are my research notes
"Of the total southern white population of 8,099,760 in 1860, only 384,000 owned slaves. Of these, 10,780 owned fifty or more. It was calculated that about 88 per cent of America's slave-owners owned twenty slaves or less." (this number does not seem to include women and children as slave owners, but still includes them as part of the total white population. Figuring 3 per family gives a total of 2,699,920, at 5 per family (one spouse and three children) it is 1,920,000 which is still only about 24%)
http://www.slavenorth.com/connecticut.htm"Even in the early 1700s, however, direct slave imports to Connecticut were considered too few to be worth the trouble of taxing. The governor reported only 110 white and black servants in Connecticut in 1709. In 1730, the colony had a black population of 700, out of a total enumeration of 38,000.
Yet on the eve of the Revolution, Connecticut had the largest number of slaves (6,464) in New England. Jackson Turner Main, surveying Connecticut estate inventories, found that in 1700 one in 10 inventories included slaves, rising to one in 4 on the eve of the Revolution." (Note, estate inventories, would not be the entire population, only the wealthy)
"In 1784, the abolition forces in the state tried a new tactic and presented a bill for gradual emancipation as part of a general statute codifying, in great detail, race relations. Almost as an afterthought, it provided that black and mulatto children born after March 1 would become free at age 25. The strategy worked, and the bill passed without opposition. An act of 1797 reduced that age to 21, bringing slavery in line with apprenticeship, though obviously slavery was not voluntary and slaves did not receive money, clothes and professional standing at the end of their servitude.
As in other Northern states, gradual emancipation freed no slaves at once. It simply set up slavery for a long-term natural death. Connecticut finally abolished slavery entirely in 1848. The 1800 census counted 951 Connecticut slaves; the number diminished thereafter to 25 in 1830, but then inexplicably rose to 54 in the 1840 census. After that, slaves were no longer counted in censuses for the northern states."
"William Penn was granted his colony in Pennsylvania in 1681, and added Delaware to it in 1682. Though he flooded the "Holy Experiment" with Quakers whose descendants would later find their faith incompatible with slaveholding, the original Quakers had no qualms about it. Penn himself owned slaves, and used them to work his estate, Pennsbury. He wrote that he preferred them to white indentured servants, "for then a man has them while they live."
In Penn's new city of Philadelphia, African slaves were at work by 1684, and in rural Chester County by 1687. Between 1729 and 1758, Chester County had 104 slaves on 58 farms, with 70 percent of the slaveowners likely Quakers. By 1693, Africans were so numerous in the colony's capital that the Philadelphia Council complained of "the tumultuous gatherings of the Negroes in the town of Philadelphia.""
"But by 1720, a wheat-based economy had sprung up, and the good reputation of Pennsylvania in Europe was luring Scots-Irish and German immigrants, who were willing to hire on as indentured servants in exchange for passage across the Atlantic. It's estimated that half the immigrants to colonial America arrived this way, and in Pennsylvania about 58,000 Germans and 16,500 Scots-Irish sailed up the Delaware between 1727 and 1754. The Quaker farmers turned to these for work on their farms. On a relatively small farm growing grain, it was cheaper to do it this way than to own slaves.
Indentured servitude was a long-term extension of the old English one-year hire for agricultural labor. Terms ranged from 1 to 17 years (children served the longest indentures), with a typical one being 4 or 5 years. The difference between indentured servants and slaves, on a day-to-day basis, was hard to define. During that time, the worker's labor, if not the worker himself, was a commodity that could be sold or traded or inherited, on the discretion of his owner. The discipline records of the Quaker meetings cover cases of members called to account for cruelty to indentured servants, and these tales tell of servants whipped, beaten and locked up for laziness."
The surrender of slavery was a minor disruption to most Pennsylvania Quakers' lives. Slavery in Pennsylvania had died of the market economy long before Quaker morality shifted against it. Despite the spike in the 1760s, there was never enough critical mass of slaveholding in Pennsylvania to produce a slave-based agricultural economy. In 1730, about one in 11 Pennsylvanians had been slaves; by 1779 the figure was no more than one in 30. The lack of a support structure by this time prevented it from catching on, even during the peak of slave importation.
The law for gradual emancipation in Pennsylvania passed on February 1780, and that's when the Mason-Dixon line began to acquire its metaphoric meaning as the boundary between North and South. But the law was no proclamation of emancipation. It was deeply conservative. The 6,000 or so Pennsylvania slaves in 1780 stayed slaves. Even those born a few days before the passage of the act had to wait 28 years before the law set them free. This allowed their masters to recoup the cost of raising them.
The act that abolished slavery in Pennsylvania freed no slaves outright, and relics of slavery may have lingered in the state almost until the Civil War. There were 795 slaves in Pennsylvania in 1810, 211 in 1820, 403 or 386 (the count was disputed) in 1830, and 64 in 1840, the last year census worksheets in the northern states included a line for "slaves." The definition of slavery seems to have blurred in the later counts. The two "slaves" counted in 1840 in Lancaster County turned out to have been freed years before, though they were still living on the properties of their former masters.