Here are some one liners...
Railroads, Riverboats and the Right to Do the Obvious -- A railroad bridge is used as an issue to thwart the Northern railway lines, and it gets really weird.
The Dred Scott Decision -- Apparently the Constitution says that Negroes are not actual citizens of the USA... not even free Negroes.
The Economic Panic of 1857 -- The Gold Rush has created a bubble that bursts this year.
In Other News -- Wine fermentation, the 'safety elevator' and the trans-Atlantic telegraph line.
Railroads, Riverboats and the Right to Do the ObviousAs a lawyer, Abraham Lincoln represents the railroads in their defense against Jefferson Davis and the riverboat companies. The question is, "Does a riverboat have the legal right under the maritime law to prevent a railroad bridge from being built across a river?" Naturally, the Rock Island Bridge has been built to accommodate the boat traffic, but the riverboat companies continue to complain until a riverboat suddenly loses power and steers into a bridge pier and catches fire. Blame is cast upon the strange currents caused by the bridge. They declare the bridge to be a menace to navigation and they go to court. Abraham Lincoln argues that a man has as much a right to cross a river as he does to go up and down the river. That argument, along with his careful measurements of the river currents results in a hung jury. The riverboat companies then jump to the Iowa courts which find that the bridge must be dismantled at the Iowa border... mid-river. This all goes to the Supreme Court where is it is determined that bridges can be built across rivers. (That was a real nail-biter, but it was an unresolved question until now.)  
The Dred Scott DecisionThe Supreme Court says that Negros are not citizens of the United States. They said that it is in the Constitution, so you know it must be true. Right? Here is how we arrived at this point. Dred Scott was a slave married to Harriet, also a slave. Their owner was an Army surgeon named Dr. John Emerson. He was stationed in various states... some of them free states. He dies and his slaves are transferred to his wife in Missouri. The bottom line is that at several points in time Dred Scott could have plead for his family's freedom in a court of law and probably won. Instead, he continued to work as a slave to be hired out by his new owner, the wife of the Army surgeon. Finally, Dred Scott offers to buy his freedom, but his owner refuses. Scott takes his owner to court in Missouri which should have ruled in his favor, but instead, the court warns of the dark forces of anti-slavery aligned to overthrow the government. Scott is doomed. This all goes to the Supreme Court which does some fancy footwork to show that somehow the Founding Fathers did not think of Negroes as citizens... not even free Negroes. Therefore they cannot bring suit in a US court. They can pay taxes, though.  
- "In the opinion of the court, the legislation and histories of the times, and the language used in the Declaration of Independence, show, that neither the class of persons who had been imported as slaves, nor their descendants, whether they had become free or not, were then acknowledged as a part of the people, nor intended to be included in the general words used in that memorable instrument."
- -- Chief Justice Roger Taney.
The Economic Panic of 1857Just a quick note on the economic conditions at this time. With all the gold from the California Gold Rush pouring in, investment in businesses has been soaring... especially in train stocks. The miles of railroad track laid has tripled. Coal production has doubled. A risky venture such as the trans-Atlantic telegraph cable would never have been contemplated without this sudden infusion of capital and optimism. As you might guess, an economic bubble is about to burst. There are rumors that Britain is about to circumvent their gold and silver reserve limits which has caused a panic. A ship bound from California to New York sinks will all its gold in the holds. The Dred Scott ruling makes people nervous about an escalation of violence in the territories. Land prices drop a little. Railroad stocks are hit and the trend becomes a slide becomes a fall. A lot of people are left holding the bag... even city governments who hoped to benefit on get-rich-quick stock tips. The economy will stabilize by next year but it won't really recover until after the War Between the States.  
In Other News
- Wine fermentation, vinegar and sour milk are caused by living organisms! A local wine maker asks Louis Pasteur to find out what turns his wine sour after storage. Pasteur finds that bacteria in the air is the cause. Can pasteurization be far behind? 1864 for beer and wine, and 1886 for milk.    
- The laying of the first trans-Atlantic telegraph cable begins. Two ships from each side of the Atlantic pay out cable. By next year, after several failed attempts, they will meet in the middle, splice the cable and it is done. It will lose connection and fail within a few weeks. They will try again in 1865.